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Removing and Replacing Parts

Dell Precision™ Workstation 470 and 670 Computers User's Guide

Before You Begin

This chapter provides procedures for removing and installing the components in your computer. Unless otherwise noted, each procedure assumes that the following conditions exist:

• You have performed the steps in "Turning Off Your Computer" and "Before Working Inside Your Computer."
  
  
• You have read the safety information in your Dell™ Product Information Guide.
  
  
• A component can be replaced by performing the removal procedure in reverse order.
  
  

Recommended Tools

The procedures in this document may require the following tools:

• Small flat-blade screwdriver
  
  
• Phillips screwdriver
  
  
• Flash BIOS update program floppy disk or CD
  
  

Turning Off Your Computer

NOTICE: To avoid losing data, save and close any open files and exit any open programs before you turn off your computer.

1. Shut down the operating system:
   
   
   1. Save and close any open files, exit any open programs, click the Start button, and then click Turn Off Computer.
      
      
   2. In the Turn off computer window, click Turn off.
      
      

The computer turns off after the operating system shutdown process finishes.

2. Ensure that the computer and any attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut down your operating system, turn them off now.
   
   

Before Working Inside Your Computer

Use the following safety guidelines to help protect your computer from potential damage and to help ensure your own personal safety.

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.

NOTICE: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell is not covered by your warranty.

NOTICE: When you disconnect a cable, pull on its connector or on its strain-relief loop, not on the cable itself. Some cables have a connector with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a cable, ensure that both connectors are correctly oriented and aligned.

NOTICE: To avoid damaging the computer, perform the following steps before you begin working inside the computer.

1. Turn off your computer.
   
   

NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.

2. Disconnect any telephone or telecommunication lines from the computer.
   
   
3. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
   
   

CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.

4. Open the computer cover.
   
   

NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.

Opening the Computer Cover

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Lay the computer on its side as shown in the illustration.
   
   

NOTICE: Ensure that sufficient space exists to accommodate the open cover—at least 30 cm (1 ft) of desk top space.

3. Slide the cover release latch toward the top of the computer.
   
   
4. Raise the cover, and pivot it toward the front of the computer.
   
   

Dell Precision 670 Workstation

1	cover release latch
2	security cable slot
3	padlock ring

Dell Precision 470 Workstation

1	security cable slot
2	cover release latch
3	padlock ring

Memory

For information on the type of memory supported by your computer, see "Specifications."

NOTICE: Before you install new memory modules, download the most recent BIOS for your computer from the Dell™ Support website at support.dell.com.

Memory Overview

NOTE: Your computer supports ECC and registered memory.

• Memory modules should be installed in pairs of matched size, speed, and rank (1R is single rank and 2R is dual rank). See the label on the memory module to determine its size, speed rank, and organization. Be sure that your memory module labels match.
  
  

Example: 256MB 1Rx8 PC2-5400R-544-10:

• Size = 256 MB
  
  
• Speed = 5400
  
  
• Rank = 1R
  
  
• Organization = x8
  
  

• Memory modules can be single rank (1R) or dual rank (2R) and should be installed in the following order:
  
  
• The highest rank memory module in DIMM_1 and DIMM_2
  
  
• Equal or lower rank memory modules in DIMM_3 and DIMM_4
  
  
• Single rank (1R) memory modules in DIMM_5 and DIMM_6
  
  
• If only two memory modules are installed, they must be installed in DIMM_1 and DIMM_2. These connectors are located on the outside edge of the board (for your Dell Precision 670, see "System Board Components" and for your Dell Precision 470 computer, see "System Board Components.")
  
  
• Memory modules should be installed in the following order: connectors DIMM_1 and DIMM_2, DIMM_3 and DIMM_4, and then DIMM_5 and DIMM_6.
  
  
• If dual-rank modules are installed in DIMM_3 and DIMM_4, then DIMM_5 and DIMM_6 cannot be used.
  
  
• Dual-rank memory modules are not supported in DIMM_5 and DIMM_6.
  
  

NOTE: Memory purchased from Dell is covered under your computer warranty.

NOTICE: If you remove your original memory modules from the computer during a memory upgrade, keep them separate from any new modules that you may have, even if you purchased the new modules from Dell. If possible, do not pair an original memory module with a new memory module. Otherwise, your computer may not start properly. You should install your original memory modules in pairs in connectors DIMM_1 and DIMM_2, connectors DIMM_3 and DIMM_4, and then DIMM_5 and DIMM6 (see "Memory Overview").

NOTICE: If you install more than 4 GB of memory, you must also install a fan to cool the computer. If you do not install a fan, you will get an error message stating that you must install a fan or remove some memory.

Installing Memory

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

NOTE: If you have incorrectly installed memory, when you start your computer you will receive an error message. Press <F2> to enter system setup and help identify the error. See "Memory Overview" for information on installation guidelines.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Press out the securing clip at each end of the memory module connector.
   
   

NOTE: Memory modules should be installed in the following order: connectors DIMM_1 and DIMM_2, DIMM_3 and DIMM_4, and then DIMM_5 and DIMM_6. See "Memory Overview" for information on installation guidelines.

1	DIMM_1 connector
2	securing clips (2)
3	connector

3. Align the notch on the bottom of the module with the crossbar in the connector.
   
   

1	cutouts (2)
2	memory module
3	notch
4	crossbar

NOTICE: To avoid damage to the memory module, press the module straight down into the connector while you apply equal force to each end of the module.

4. Insert the module into the connector until the module snaps into position.
   
   

If you insert the module correctly, the securing clips snap into the cutouts at each end of the module.

5. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

6. Connect your computer and devices to electrical outlets, and turn them on.
   
   
7. Press <F2> to enter system setup and check the value for System Memory.
   
   

The value of System Memory should reflect the newly installed memory. Verify the new total. If it is correct, skip to step 10.

8. If the memory total is incorrect, turn off and disconnect your computer and devices from their electrical outlets.
   
   
9. Open the computer cover and check the installed memory modules to ensure that they are seated properly in their sockets. Then repeat step 5 through step 7.
   
   
10. When the System Memory total is correct, press <Esc> to exit system setup.
    
    
11. Run the Dell Diagnostics to verify that the memory modules are operating properly.
    
    

Removing Memory

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Press out the securing clip at each end of the memory module connector.
   
   
3. Grasp the module and pull up.
   
   

If the module is difficult to remove, gently ease the module back and forth to remove it from the connector.

Memory Fan and Shroud

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: If you install more than 4 GB of memory, you must also install a fan to cool the computer. If you do not install a fan, you will get an error message stating that you must install a fan or remove some memory.

Installing the Memory Fan and Shroud

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Align the tabs on the back of the shroud with the back of computer.
   
   
3. Insert the tabs and lower the shroud in place over the memory modules.
   
   
4. Connect the fan cable to the memory fan connector labeled "FAN_MEM" on the system board (for your Dell Precision 670, see "System Board Components" and for your Dell Precision 470 computer, see "System Board Components").
   
   

Drives for the Dell Precision 670 Computer

Overview

Your computer supports:

• Three hard drives (Serial ATA and SCSI)
  
  
• One floppy drive (optional)
  
  
• Three CD or DVD drives (One bay may be used for an additional hard drive using an add-in bay bracket.)
  
  

1	floppy drive (optional)
2	CD/DVD drive(s)
3	hard drive(s)

Connecting Cables

When you connect two IDE devices to a single IDE interface cable and configure them for the cable select setting, the device attached to the last connector on the interface cable is the primary or boot device (drive 0), and the device attached to the middle connector on the interface cable is the secondary device (drive 1). See the drive documentation in your upgrade kit for information on configuring devices for the cable select setting.

Since cable select is the default setting, any additional drives that are installed do not need to be set as a primary or secondary drive.

Hard drives should be connected to the connector labeled SATA_0 and SATA_1.

IDE CD/DVD drives should be connected to the connector labeled IDE1 and IDE2.

When you install a drive, you connect two cables—a DC power cable and a data cable—to the back of the drive and to the system board. Some drives may also have an audio connector; one end of the audio cable attaches to the drive connector and the other attaches to the system board.

Drive Connectors

IDE Drive Connector	Serial ATA Connector

1	interface cable
2	interface connector

When connecting and disconnecting a serial ATA cable, hold the cable by the connector at each end.

SCSI Device Installation Guidelines

This section describes how to configure and install SCSI devices in your computer. To install a SCSI device, you can use one or both of the following SCSI controllers:

• The SCSI connector on the system board. To locate the SCSI system board connector, see the system board illustration (for the Dell Precision 670 computer, see "System Board Components") or the interior service label.
  
  

NOTE: The system board SCSI controller supports hard drives only. Do not connect CD or DVD drives, tape drives, or DAT drives.

• A SCSI controller card installed in your computer.
  
  

SCSI ID Numbers

Internal SCSI devices must have a unique SCSI ID number from 0 to 15. If you are using the SCSI connector on the system board and a SCSI controller card installed in your computer, you have two separate SCSI buses operating. Each SCSI bus has a set of SCSI ID numbers from 0 to 15.

When SCSI devices are shipped from the factory, the default SCSI ID numbers are assigned as shown in the following table.

System Board Controller		Controller Card
Device	ID	Device	ID
Controller	7	Controller	7
Boot hard drive	0	Boot hard drive	0
		CD or DVD drive	5
		tape or DAT drive	6
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that devices be attached to the cable in order by ID number. If two or more devices use the same ID, your computer may hang during POST and in SCSI BIOS.

SCSI devices installed by Dell are configured correctly during the manufacturing process. You do not need to set the SCSI ID for these SCSI devices.

If you attach additional optional SCSI devices, see the documentation for each device for information about setting the appropriate SCSI ID number.

NOTICE: Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not guaranteed to work with Dell computers.

Device Termination

SCSI logic requires that termination be enabled for the two devices at opposite ends of the SCSI chain and disabled for all devices in between.

It is recommended that you use terminated cables and that you disable termination on all devices. See the documentation provided with any optional SCSI device you purchase for information on disabling termination on the device.

General Guidelines

Follow these general guidelines when installing SCSI devices in your computer:

• Although you install SCSI devices essentially the same way as other devices, their configuration requirements are different. For details on configuring your particular SCSI subsystem, see the documentation for your SCSI devices and/or your host adapter card.
  
  
• Configure the device for a SCSI ID number and disable termination, if necessary.
  
  
• To use an external SCSI device, you must have a SCSI controller card installed in your computer. Connect one end of the external SCSI cable to the connector on the back of the SCSI device. Attach the other end of the external SCSI cable to the connector on the controller card installed in the computer.
  
  
• After you install a SCSI hard drive, Primary Drive 0 and Primary Drive 1 should be set to None in system setup if no IDE hard drives are installed. If you have any IDE devices on the second IDE channel, such as a CD or tape drive, Secondary Drive 0 and/or Secondary Drive 1 should be set to Auto.
  
  
• To partition and format SCSI hard drives, you may need to use programs other than those provided with the operating system. See the documentation that came with your SCSI software drivers for information on installing the appropriate drivers and preparing your SCSI hard drive for use.
  
  

SCSI Cables

Ultra 320, Ultra 160/m, and Ultra2/Wide LVD drives (typically hard drives) both use a 68-pin cable. One end of the cable attaches to the SCSI connector on the system board or the SCSI controller card installed in your computer. The remaining connectors on the cable attach to the various drives.

Narrow SCSI drives (tape drives, CD drives, and some hard drives) use a 50-pin cable. One end of this cable attaches to the SCSI controller card. The remaining connectors on the cable attach to the various Narrow SCSI devices.

NOTICE: Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not guaranteed to work with Dell computers.

Hard Drive

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a foam pad, that will sufficiently cushion it.

1. If you are replacing a hard drive that contains data you want to keep, back up your files before you begin this procedure.
   
   
2. Follow the procedures in "Removing and Replacing Parts."
   
   

Removing a Hard Drive

1. Press in on the top shroud tabs and tilt the shroud back.
   
   
2. Lift the shroud away from the hard drive.
   
   

3. Disconnect the power and hard-drive cables from the drive.
   
   
4. Press in on the tabs on each side of the drive and slide the drive up and out.
   
   

1	power cable
2	hard-drive cable
3	tabs (2)
4	hard drive
5	system board connector

Installing a Hard Drive

NOTE: SATA2_0 is the bootable connector.

1. Unpack the replacement hard drive, and prepare it for installation.
   
   
2. Check the documentation for the drive to verify that it is configured for your computer.
   
   
3. If your replacement hard drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

1	drive
2	bracket rails (2)
3	screws (4)

4. Gently slide the drive into place until the tabs securely click into position.
   
   

NOTE: If you are installing a hard drive in the lower bay, place the drive in the bay so that the power connector is on the left-hand side (opposite of the top hard drive).

1	power cable
2	hard-drive cable
3	tabs (2)
4	hard drive
5	system board connector

5. If you are installing a drive that has its own controller card, install the controller card in an expansion slot.
   
   

See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer.

NOTICE: Match the colored strip on the cable with pin 1 on the drive (pin 1 is marked as "1").

6. Connect the power and hard-drive cables to the drive.
   
   
7. Ensure that all connectors are properly cabled and firmly seated.
   
   

NOTICE: When replacing the hard-drive shroud, ensure that all the cables are properly routed.

8. Insert the bottom tabs of the shroud into the holes on the drive cage and rotate the shroud up.
   
   
9. Press in on the top tabs and lock them into place.
   
   
10. Gently press on the shroud to ensure that it is secure.
    
    

11. Close the computer cover.
    
    

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

12. Connect your computer and devices to electrical outlets, and turn them on.
    
    

See the documentation that came with the drive for instructions on installing any software required for drive operation.

13. If the drive you just installed is the primary drive, insert a bootable medium into your boot drive.
    
    
14. Turn on the computer.
    
    
15. Enter system setup, and update the your drive configuration.
    
    
16. After you have updated the system settings, exit system setup, and restart the computer.
    
    
17. Partition and logically format your drive before you proceed to the next step.
    
    

See the documentation for your operating system for instructions.

18. Test the hard drive by running the Dell Diagnostics.
    
    
19. If the drive you just installed is the primary drive, install your operating system on the hard drive.
    
    

Floppy Drive (Optional)

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Removing a Floppy Drive

1. Follow the procedure in "Removing and Replacing Parts."
   
   
2. Disconnect the power and floppy-drive cables from the back of the floppy drive.
   
   
3. Press inward on the two tabs on the sides of the drive, slide the drive upward, and remove it from the floppy-drive bay.
   
   

1	power cable
2	floppy-drive cable
3	tabs (2)
4	floppy drive

Installing a Floppy Drive

1. If you are replacing a drive and the new drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

1	drive
2	bracket rails (2)
3	screws (4)

2. Gently slide the drive into place until the tabs securely click into position.
   
   

1	power cable
2	floppy-drive cable
3	tabs (2)
4	floppy drive

3. Attach the power and floppy-drive cables to the floppy drive.
   
   
4. If you are installing a new floppy drive rather than replacing a drive, remove the front-panel inserts.
   
   

From inside the drive bay, gently press on each side of the insert until it pops out.

5. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
   
   
6. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Connect your computer and devices to electrical outlets, and turn them on.
   
   

See the documentation that came with the drive for instructions on installing any software required for drive operation.

8. Enter system setup and update the appropriate Diskette Drive A option to reflect the size and capacity of your new floppy drive.
   
   
9. To verify that your computer works correctly, run the Dell Diagnostics.
   
   

CD/DVD Drive

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Removing a CD/DVD Drive

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Disconnect the power and CD/DVD drive cables from the drive.
   
   
3. Press inward on the two tabs on the sides of the drive, and then slide the drive upward and remove it from the drive bay.
   
   

1	power cable
2	tabs (2)
3	CD/DVD drive cable
4	CD/DVD drive
5	audio cable (some drives do not have this cable)

Installing a CD/DVD Drive

NOTE: A fourth hard drive can be added to the CD/DVD bay using an add-in bay bracket. Contact Dell to order a bracket.

1. If you are installing a new drive, unpack the drive and prepare it for installation.
   
   

Check the documentation that accompanied the drive to verify that the drive is configured for your computer. If you are installing an IDE drive, configure the drive for the cable select setting.

2. Connect the new drive to the set of rails that are attached to the inside of the cover. If a set of rails is not attached inside the computer cover, contact Dell.
   
   
3. If you are installing a replacement drive and the new drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

1	drive
2	bracket rails (2)
3	screws (4)

4. Gently slide the drive into place until the tabs securely click into position.
   
   
5. If you are installing a drive that has its own controller card, install the controller card in an expansion slot.
   
   

See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer.

6. Connect the power and CD/DVD drive cables to the drive.
   
   

If you are adding a drive that has an audio cable, connect the audio cable to the audio connector on the system board.

1	power cable
2	tabs (2)
3	CD/DVD drive cable
4	CD/DVD drive
5	audio cable (some drives do not have this cable)

7. If you are installing a new CD/DVD drive rather than replacing a drive, remove the
   front-panel inserts.
   
   

From inside the drive bay, gently press on each side of the insert until it pops out.

8. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
   
   
9. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

10. Connect your computer and devices to electrical outlets, and turn them on.
    
    

See the documentation that came with the drive for instructions on installing any software required for drive operation.

11. Update your configuration information by setting the appropriate Drive option (0 or 1) under Drives: Secondary to Auto. See "Advanced Features" for more information.
    
    
12. Verify that your computer works correctly by running the Dell Diagnostics.
    
    

Drive Door for the Dell Precision 670 Computer

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Removing the Drive Door

1. Open the drive door.
   
   

2. Unsnap the top bracket hinge and pull the top of the drive door outward, away from the computer.
   
   

1	top bracket hinge
2	bottom bracket hinge

3. Lift the bottom bracket hinge away from the computer.
   
   

Replacing the Drive Door

To prevent damage to your computer, the drive door is designed to "break away" from the computer if it is opened too far. If the drive door detaches from the computer without disassembling, perform the removal procedure in reverse.

If the drive door is open and it is opened too far, instead of breaking away from the computer in one piece, the drive door may disassemble into several smaller pieces. If the drive door disassembles:

1. If necessary, reattach the door hinges to the door bracket. Ensure that the hinge tabs are away from the door bracket.
   
   

1	hinge tab
2	door hinge
3	door bracket

2. Attach the door bracket/door hinge assembly to the door, starting with the lower part of each door hinge.
   
   

1	door
2	door bracket/door hinge assembly
3	lower part of the door hinge

3. Attach the drive door to the computer, starting with the bottom bracket hinge.
   
   

Drives for the Dell Precision 470 Computer

Overview

Your computer supports:

• Two hard drives (Your computer supports SCSI with an add-in controller and Serial ATA.)
  
  
• One floppy drive (optional)
  
  
• Two CD or DVD drives
  
  

1	hard drive(s)
2	floppy drive (optional)
3	CD/DVD drive(s)

Connecting Cables

When you connect two IDE devices to a single IDE interface cable and configure them for the cable select setting, the device attached to the last connector on the interface cable is the primary or boot device (drive 0), and the device attached to the middle connector on the interface cable is the secondary device (drive 1). See the drive documentation in your upgrade kit for information on configuring devices for the cable select setting.

Since cable select is the default setting, any additional drives that are installed do not need to be set as a primary or secondary drive.

Hard drives should be connected to the connector labeled SATA_0 and SATA_1.

IDE CD/DVD drives should be connected to the connector labeled IDE1 and IDE2.

When you install a drive, you connect two cables—a DC power cable and a data cable—to the back of the drive and to the system board. Some drives may also have an audio connector; one end of the audio cable will attach to the drive connector and the other will attach to the system board.

Drive Connectors

IDE Drive Connector	Serial ATA Connector

1	interface cable
2	interface connector

When connecting and disconnecting a serial ATA cable, hold the cable by the connector at each end.

SCSI Device Installation Guidelines

This section describes how to configure and install SCSI devices in your computer.

NOTE: The system board SCSI controller supports hard drives only. Do not connect CD or DVD drives, tape drives, or DAT drives.

SCSI ID Numbers

Internal SCSI devices must have a unique SCSI ID number from 0 to 15. If you are using the SCSI connector on the system board and a SCSI controller card installed in your computer, you have two separate SCSI buses operating. Each SCSI bus has a set of SCSI ID numbers from 0 to 15.

When SCSI devices are shipped from the factory, the default SCSI ID numbers are assigned as shown in the following table.

System Board Controller		Controller Card
Device	ID	Device	ID
Controller	7	Controller	7
Boot hard drive	0	Boot hard drive	0
		CD or DVD drive	5
		tape or DAT drive	6
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that devices be attached to the cable in order by ID number. If two or more devices use the same ID, your computer may hang during POST and in SCSI BIOS.

SCSI devices installed by Dell are configured correctly during the manufacturing process. You do not need to set the SCSI ID for these SCSI devices.

If you attach additional optional SCSI devices, see the documentation for each device for information about setting the appropriate SCSI ID number.

NOTICE: Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not guaranteed to work with Dell computers.

Device Termination

SCSI logic requires that termination be enabled for the two devices at opposite ends of the SCSI chain and disabled for all devices in between.

It is recommended that you use terminated cables and that you disable termination on all devices. See the documentation provided with any optional SCSI device you purchased for information on disabling termination on the device.

General Guidelines

Follow these general guidelines when installing SCSI devices in your computer:

• Although you install SCSI devices essentially the same way as other devices, their configuration requirements are different. For details on configuring your particular SCSI subsystem, see the documentation for your SCSI devices and/or your host adapter card.
  
  
• Configure the device for a SCSI ID number and disable termination, if necessary.
  
  
• To use an external SCSI device, you must have a SCSI controller card installed in your computer. Connect one end of the external SCSI cable to the connector on the back of the SCSI device. Attach the other end of the external SCSI cable to the connector on the controller card installed in the computer.
  
  
• After you install a SCSI hard drive, Primary Drive 0 and Primary Drive 1 should be set to None in system setup if no EIDE hard drives are installed. If you have any EIDE devices on the second EIDE channel, such as a CD or tape drive, Secondary Drive 0 and/or Secondary Drive 1 should be set to Auto.
  
  
• You may need to use programs other than those provided with the operating system to partition and format SCSI hard drives. See the documentation that came with your SCSI software drivers for information on installing the appropriate drivers and preparing your SCSI hard drive for use.
  
  

SCSI Cables

Ultra 320 (optional on the Dell Precision 470 computer), Ultra 160/m and Ultra2/Wide LVD drives (typically hard drives) both use a 68-pin cable. One end of the cable attaches to the SCSI connector on the system board or the SCSI controller card installed in your computer. The remaining connectors on the cable attach to the various drives.

Narrow SCSI drives (tape drives, CD drives, and some hard drives) use a 50-pin cable. One end of this cable attaches to the SCSI controller card. The remaining connectors on the cable attach to the various Narrow SCSI devices.

NOTICE: Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not guaranteed to work with Dell computers.

Hard Drive

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a foam pad, that will sufficiently cushion it.

Removing a Hard Drive

1. If you are replacing a hard drive that contains data you want to keep, back up your files before you begin this procedure.
   
   
2. Follow the instructions in "Removing and Replacing Parts."
   
   
3. Disconnect the power and hard-drive cables from the drive.
   
   

1	power cable
2	serial ATA hard-drive cable

4. Press in on the tabs on each side of the drive and slide the drive up and out.
   
   

1	tab (2)
2	hard drive

Installing a Hard Drive

NOTE: SATA2_0 is the bootable connector.

1. Unpack the replacement hard drive, and prepare it for installation.
   
   
2. Check the documentation for the drive to verify that it is configured for your computer.
   
   
3. If your replacement hard drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

1	drive
2	bracket rails (2)
3	screws (4)

4. Gently slide the drive into place until the tabs securely click into position.
   
   

NOTE: If you are installing a hard drive in the lower bay, the drive should be placed in the bay so that the power connector is on the left-hand side (opposite of the top hard drive).

5. If you are installing a drive that has its own controller card, install the controller card in an expansion slot.
   
   

See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer.

NOTICE: Match the colored strip on the cable with pin 1 on the drive (pin 1 is marked as "1").

6. Connect the power and hard-drive cables to the drive.
   
   

1	power cable
2	serial ATA hard-drive cable

7. Ensure that all connectors are properly cabled and firmly seated.
   
   
8. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

9. Connect your computer and devices to electrical outlets, and turn them on.
   
   

See the documentation that came with the drive for instructions on installing any software required for drive operation.

10. If the drive you just installed is the primary drive, insert a bootable medium into your boot drive.
    
    
11. Turn on the computer.
    
    
12. Enter system setup, and update the your drive configuration.
    
    
13. After you have updated the system settings, exit system setup, and restart the computer.
    
    
14. Partition and logically format your drive before you proceed to the next step.
    
    

See the documentation for your operating system for instructions.

15. Test the hard drive by running the Dell Diagnostics.
    
    
16. If the drive you just installed is the primary drive, install your operating system on the hard drive.
    
    

Floppy Drive (Optional)

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Removing a Floppy Drive

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Disconnect the power and floppy-drive cables from the back of the floppy drive.
   
   

1	power cable
2	floppy-drive cable
3	floppy-drive connector (DSKT)

3. Press inward on the two tabs on the sides of the drive, slide the drive upward, and then remove it from the floppy-drive bay.
   
   

1	tabs (2)
2	floppy drive (optional)

Installing a Floppy Drive

1. If you are replacing a drive and the new drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

1	drive
2	bracket rails (2)
3	screws (4)

2. Gently slide the drive into place until the tabs securely click into position.
   
   

3. Attach the power and floppy-drive cables to the floppy drive.
   
   

1	power cable
2	floppy-drive cable
3	system board connector

4. If you are installing a new floppy drive rather than replacing a drive, remove the front-panel inserts.
   
   

From inside the drive bay, gently press on each side of the insert until it pops out.

5. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
   
   
6. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Connect your computer and devices to electrical outlets, and turn them on.
   
   

See the documentation that came with the drive for instructions on installing any software required for drive operation.

8. Enter system setup and update the appropriate Diskette Drive A option to reflect the size and capacity of your new floppy drive.
   
   
9. To verify that your computer works correctly, run the Dell Diagnostics.
   
   

CD/DVD Drive

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Removing a CD/DVD Drive

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Disconnect the power and CD/DVD drive cables from the back of the drive.
   
   

1	CD/DVD drive cable
2	power cable

3. Press inward on the two tabs on the sides of the drive, and then slide the drive upward and remove it from the drive bay.
   
   

1	tabs (2)
2	CD/DVD drive

Installing a CD/DVD Drive

1. If you are installing a new drive, unpack the drive and prepare it for installation.
   
   

Check the documentation that accompanied the drive to verify that the drive is configured for your computer. If you are installing an IDE drive, configure the drive for the cable select setting.

2. Connect the new drive to the set of rails that are attached to the inside of the computer cover. If a set of rails is not attached inside the cover, contact Dell for the number to call for assistance.
   
   
3. If you are installing a replacement drive and the new drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure each rail to the drive. Attach the bracket to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and then inserting and tightening all four screws (two screws on each rail).
   
   

1	drive
2	bracket rails (2)
3	screws (4)

4. Gently slide the drive into place until the tabs securely click into position.
   
   

5. If you are installing a drive that has its own controller card, install the controller card in an expansion slot.
   
   

See the documentation that accompanied the drive and controller card to verify that the configuration is correct for your computer.

6. Connect the power and CD/DVD drive cables to the drive.
   
   

If you are adding a drive that has an audio cable, connect the audio cable to the audio connector on the system board.

1	audio cable (some drives do not have this cable)
2	CD/DVD drive cable
3	power cable

7. If you are installing a new CD/DVD drive rather than replacing a drive, remove the
   front-panel inserts.
   
   

From inside the drive bay, gently press on each side of the insert until it pops out.

8. Check all cable connections, and fold cables out of the way to provide airflow for the fan and cooling vents.
   
   
9. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

10. Connect your computer and devices to electrical outlets, and turn them on.
    
    

See the documentation that came with the drive for instructions on installing any software required for drive operation.

11. Update your configuration information by setting the appropriate Drive option (0 or 1) under Drives: Secondary to Auto. See "Advanced Features" for more information.
    
    
12. To verify that your computer works correctly, run the Dell Diagnostics.
    
    

Cards

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

Your Dell™ Precision 670 computer provides the following slots for PCI and PCI Express cards:

• One PCI card slot
  
  
• Three PCIx slots
  
  
• One PCI Express x16 card slot
  
  
• One PCI Express x8 card slot (runs at x4 only)
  
  

Your Dell™ Precision 470 computer provides the following slots for PCI and PCI Express cards:

• One PCI card slot
  
  
• One PCIx slots
  
  
• One PCI Express x16 card slot
  
  
• One PCI Express x8 card slot (runs at x4 only)
  
  

PCI Cards

If you are installing or replacing a card, follow the procedures in the next section. If you are removing but not replacing a card, see "Removing a PCI Card."

If you are replacing a card, remove the current driver for the card from the operating system.

If you are installing or replacing a PCI Express card, see "Installing a PCI Express Card."

Installing a PCI Card

13. Follow the procedures in "Removing and Replacing Parts."
    
    
14. Press the lever on the card retention arm and raise the retention arm.
    
    

1	PCI card	4	filler bracket
2	edge connector	5	retention arm
3	card connector	6	lever

15. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 17.
    
    
16. If you are replacing a card that is already installed in the computer, remove the card.
    
    

If necessary, disconnect any cables connected to the card. Grasp the card by its top corners, and ease it out of its connector.

17. Prepare the card for installation.
    
    

See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your computer.

CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any cards.

18. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.
    
    

If the card is full-length, insert the end of the card into the card guide bracket as you lower the card toward its connector on the system board. Insert the card firmly into the card connector on the system board.

1	bracket within slot
2	bracket caught outside of slot
3	fully seated card
4	not fully seated card

19. Before you lower the retention arm, ensure that:
    
    
    • The tops of all cards and filler brackets are flush with the alignment bar.
      
      
    • The notch in the top of the card or filler bracket fits around the alignment guide.
      
      
20. Press the retention arm into place, securing the card(s) in the computer.
    
    

1	filler bracket
2	alignment bar
3	alignment guide
4	retention arm

NOTICE: Do not route card cables over or behind the cards. Cables routed over the cards can prevent the computer cover from closing properly or cause damage to the equipment.

21. Connect any cables that should be attached to the card.
    
    

See the documentation for the card for information about the card's cable connections.

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

22. Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
    
    
23. If you installed a sound card:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Sound to Off.
       
       
    2. Connect external audio devices to the sound card's connectors. Do not connect external audio devices to the microphone, speaker/headphone, or line-in connectors on the back panel.
       
       
24. If you installed an add-in network adapter:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Network Interface Card to Off.
       
       
    2. Connect the network cable to the add-in network adapter's connectors. Do not connect the network cable to the integrated connector on the back panel.
       
       
25. Install any drivers required for the card as described in the card documentation.
    
    

Removing a PCI Card

1. Follow the procedures in "Before You Begin."
   
   
2. Press the lever on the card retention arm and raise the retention arm.
   
   
3. If necessary, disconnect any cables connected to the card.
   
   
4. Grasp the card by its top corners, and ease it out of its connector.
   
   
5. If you are removing the card permanently, install a filler bracket in the empty card-slot opening.
   
   

If you need a filler bracket, contact Dell.

NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keep dust and dirt out of your computer.

6. Lower the retention arm and press it into place, securing the card(s) in the computer.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
   
   
8. Remove the card's driver from the operating system.
   
   
9. If you removed a sound card:
   
   
   1. Enter system setup, select Integrated Devices, and then change the setting for Sound to On.
      
      
   2. Connect external audio devices to the audio connectors on the back panel of the computer.
      
      
10. If you removed an add-in network connector:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Network Interface Card to On.
       
       
    2. Connect the network cable to the integrated connector on the back panel of the computer.
       
       

PCI Express Cards

Your computer supports one PCI Express x16 card and one PCI Express x8 card, runs at x4 only.

1	PCI Express x16 card
2	PCI Express x16 card slot

If you are installing or replacing a PCI Express card, follow the procedures in the next section. If you are removing but not replacing a PCI Express card, see "Removing a PCI Express Card."

If you are replacing a card, remove the current driver for the card from the operating system.

If you are installing or replacing a PCI card, see "Installing a PCI Card."

Installing a PCI Express Card

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Press the lever on the card retention arm and raise the retention arm.
   
   

1	top of retention mechanism	8	edge connector
2	x16 card	9	card connector
3	securing slot	10	filler bracket
4	securing tab	11	retention arm
5	edge connector	12	lever
6	card connector	13	tab
7	card

3. If you are installing a new card, remove the filler bracket to create a card-slot opening. Then continue with step 17.
   
   
4. If you are replacing a card that is already installed in the computer, remove the card.
   
   

If necessary, disconnect any cables connected to the card. If your card includes a card retention bar, remove the bar. Gently pull the securing tab, grasp the card by its top corners, and ease it out of its connector.

5. Prepare the card for installation.
   
   

See the documentation that came with the card for information on configuring the card, making internal connections, or otherwise customizing it for your computer.

CAUTION: Some network adapters automatically start the computer when they are connected to a network. To guard against electrical shock, be sure to unplug your computer from its electrical outlet before installing any cards.

6. If you are installing the card into the x16 card connector, position the card so the securing slot is aligned with the securing tab, and gently pull the securing tab.
   
   
7. Place the card in the connector and press down firmly. Ensure that the card is fully seated in the slot.
   
   

If the card is full-length, insert the end of the card into the card guide bracket as you lower the card toward its connector on the system board. Insert the card firmly into the card connector on the system board.

1	bracket within slot
2	bracket caught outside of slot
3	fully seated card
4	not fully seated card

8. If you replaced a card that was already installed in the computer and you removed a card retention bar, you can reinstall the bar.
   
   
9. Before you lower the retention arm, ensure that:
   
   
   • The tops of all cards and filler brackets are flush with the alignment bar.
     
     
   • The notch in the top of the card or filler bracket fits around the alignment guide.
     
     
10. Press the retention arm into place, securing the card(s) in the computer.
    
    

1	filler bracket
2	alignment bar
3	alignment guide
4	retention arm

NOTICE: Do not route card cables over or behind the cards. Cables routed over the cards can prevent the computer cover from closing properly or cause damage to the equipment.

11. Connect any cables that should be attached to the card.
    
    

See the documentation for the card for information about the card's cable connections.

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

12. Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
    
    
13. If you installed a sound card:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Sound to Off.
       
       
    2. Connect external audio devices to the sound card's connectors. Do not connect external audio devices to the microphone, speaker/headphone, or line-in connectors on the back panel.
       
       
14. If you installed an add-in network adapter:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Network Interface Card to Off.
       
       
    2. Connect the network cable to the add-in network adapter's connectors. Do not connect the network cable to the integrated connector on the back panel.
       
       
15. Install any drivers required for the card as described in the card documentation.
    
    

Removing a PCI Express Card

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Press the lever on the card retention arm and raise the retention arm.
   
   
3. If necessary, disconnect any cables connected to the card.
   
   
4. If your card includes a card retention bar, remove the bar.
   
   
5. Gently pull back and hold the securing tab, grasp the card by its top corners, and then ease it out of its connector.
   
   
6. If you are removing the card permanently, install a filler bracket in the empty card-slot opening.
   
   

If you need a filler bracket, contact Dell.

NOTE: Installing filler brackets over empty card-slot openings is necessary to maintain FCC certification of the computer. The brackets also keep dust and dirt out of your computer.

7. Lower the retention arm and press it into place, securing the card(s) in the computer.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

8. Close the computer cover, reconnect the computer and devices to electrical outlets, and then turn them on.
   
   
9. Remove the card's driver from the operating system.
   
   
10. If you installed a sound card:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Sound to Off.
       
       
    2. Connect external audio devices to the sound card's connectors. Do not connect external audio devices to the microphone, speaker/headphone, or line-in connectors on the back panel.
       
       
11. If you installed an add-in network adapter:
    
    
    1. Enter system setup, select Integrated Devices, and then change the setting for Network Interface Card to Off.
       
       
    2. Connect the network cable to the add-in network adapter's connectors. Do not connect the network cable to the integrated connector on the back panel.
       
       
12. Install any drivers required for the card as described in the card documentation.
    
    

Processor Airflow Shroud

Installing the Airflow Shroud

CAUTION: Before you perform this procedure, follow the safety instructions located in the Product Features Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. If you have added a second processor to your computer:
   
   
   1. Remove the airflow shroud insert.
      
      
   2. Install the second fan in the airflow shroud insert.
      
      
3. Connect the fan power cable to the connector on the board. For the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components."
   
   
4. Align the shroud rails with the guide mounted on the back of the computer.
   
   
5. Gently slide the shroud down over the heat sink until the anchors snap into place.
   
   

1	airflow shroud
2	shroud guide

Removing the Airflow Shroud

CAUTION: Before you perform this procedure, follow the safety instructions located in the Product Features Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Unplug the fan power cable from the system board (for the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components").
   
   
3. Press in the two tabs at the top-back corners of the shroud to disengage the anchors.
   
   
4. While pressing the tabs inward, slide the shroud up and out of the computer.
   
   

1	tabs (2)
2	airflow shroud

Removing the Airflow Shroud Insert

If you have added a second processor to your computer, you must remove the insert from the airflow shroud in order to install the processor airflow shroud.

1. Press in the single tab on the left side of the shroud.
   
   
2. While pressing the tab inward, slide the insert out of the shroud.
   
   

1	tab
2	airflow shroud
3	airflow shroud insert

Installing the Second Fan

If you have added a second processor to your computer, you must install the second fan in the airflow shroud before installing the airflow shroud in the computer.

1. Remove the airflow shroud insert.
   
   
2. Feed the ends of the rubber grommets through the holes at each corner of the fan on the air- intake side. Airflow orientation is shown on the side of the fan.
   
   
3. With the fan power cable oriented downward, align the grommets in the fan with the holes in each corner of the shroud and pull through until they snap into place.
   
   
4. Follow the instructions for "Installing the Airflow Shroud."
   
   

1	second fan
2	airflow shroud
3	fan power cable
4	rubber grommets (4)

Processor

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

Installation Guidelines

• Your computer is designed for dual-processor operations. The heat sinks (CPU_0 and CPU_1) are keyed to fit their specific connector.
  
  
• For single-processor operations, the processor must be installed in socket CPU_0. The VRM for the single processor is already installed and cannot be removed. Processor socket 1 and VRM connector must be empty. To locate these components, see the system board components illustration (for the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components") or the system board label inside your computer.
  
  
• For dual-processor operations, both processor sockets and the VRM connector must be populated. To locate the VRM connector, see the system board components illustration (for the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components") or the system board label inside your computer.
  
  
• For dual-processor operations, the two processors and the VRMs must be identical. If the processors do not match, you will receive a system message. If the processors voltage don't match or the VRM is not properly installed, the diagnostic lights indicate an error.
  
  
• If you are upgrading your processor, keep your original processor heat sink and securing clips for future troubleshooting.
  
  
• If you are removing the second processor (CPU_1), you must also remove the VRM.
  
  

Installing the Processor

CAUTION: The processor can get very hot during normal operation. Ensure that the processor has had sufficient time to cool before you touch it.

CAUTION: Before you perform this procedure, follow the safety instructions located in the Product Information Guide.

NOTICE: If you are installing a second processor, you must remove the first heat sink before you can install the second processor and heat sink.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Remove the processor airflow shroud.
   
   

If you are replacing a processor, see "Installing the Processor."

NOTICE: You must position the processor correctly in the socket to avoid permanent damage to the processor and the computer.

3. If the release lever is not extended to the release position, move it to that position.
   
   
4. Align pin-1 (the imprinted corner) of the processor and pin-1 of the socket.
   
   

NOTICE: Processor pins are delicate. To avoid damage, ensure that the processor aligns properly with the socket, and do not use excessive force when you install the processor.

5. Carefully set the processor in the socket and press it down lightly to seat it.
   
   
6. Rotate the release lever back toward the system board until it snaps into place, securing the processor.
   
   

1	release lever
2	processor
3	processor socket
4	processor pin-1 indicator
5	socket pin-1 indicator

7. Remove the thermal grease protective cover and place the heat sink in the base.
   
   
8. Install the heat sink:
   
   
   1. Slide one end of the heat sink under the retention tab.
      
      
   2. Pull out the other retention tab and lower the heat sink until it fits securely in the base.
      
      

9. Replace the retention module clips.
   
   
10. If you installed a processor replacement kit from Dell, return the original heat sink assembly and processor to Dell in the same package in which your replacement kit was sent.
    
    
11. If you are installing a second processor, install the VRM.
    
    
12. Replace the airflow shroud.
    
    
13. Close the computer cover.
    
    

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

14. Connect your computer and devices to electrical outlets, and turn them on.
    
    

Removing the Processor

NOTE: It is recommended that only a technically knowledgeable person perform this procedure.

CAUTION: The processor can get very hot during normal operation. Ensure that the processor has had sufficient time to cool before you touch it.

CAUTION: Before you perform this procedure, follow the safety instructions located in the Product Information Guide.

1. Remove the processor airflow shroud.
   
   

NOTICE: If you are installing a processor upgrade kit from Dell, discard the original heat sink. If you are not installing a processor upgrade kit from Dell, reuse the original heat sink when you install your new processor.

2. If you have dual processors, remove the VRM.
   
   

NOTE: If you have dual processors, remove the primary heat sink and processor before removing the secondary ones.

3. Remove the heat sink:
   
   
   1. Remove the two retention module clips by pressing the tabs together and lifting the retention module clips up.
      
      

2. On the retention base, locate the tab at the back of the computer. Push out on the tab (towards the back of the computer). The heat sink pops up slightly.
   
   
3. Push out on the second retention tab while lifting the heat sink up and out of the retention base.
   
   

NOTICE: Lay the heat sink down with the thermal material facing upward.

4. Pull the release lever straight up until the processor is released.
   
   

NOTICE: Be careful not to bend any of the pins when you remove the processor from the socket. Bending the pins can permanently damage the processor.

1	release lever
2	processor
3	socket

5. Remove the processor from the socket.
   
   

If you are replacing the processor, leave the release lever extended in the release position so that the socket is ready for the new processor and go to "Installing the Processor."

6. Replace the airflow shroud.
   
   
7. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

8. Connect your computer and devices to electrical outlets, and turn them on.
   
   

Battery

Replacing the Battery

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer.

A coin-cell battery maintains computer configuration, date, and time information. The battery can last several years.

The battery may need replacing if you have repeatedly reset the time and date information after turning on the computer or if one of the following messages appear:

Time-of-day not set - please run SETUP program

or

Invalid configuration information -
please run SETUP program

or

Strike the F1 key to continue,
F2 to run the setup utility

To determine whether you need to replace the battery, reenter the time and date in system setup and exit the program to save the information. Turn off your computer and disconnect it from the electrical outlet for a few hours; then reconnect the computer, turn it on, and enter system setup. If the date and time are not correct in system setup, replace the battery.

You can operate your computer without a battery; however, without a battery, the configuration information is erased if the computer is turned off or unplugged from the electrical outlet. In this case, you must enter system setup and reset the configuration options.

CAUTION: A new battery can explode if it is incorrectly installed. Replace the battery only with the same or equivalent type recommended by the manufacturer. Discard used batteries according to the manufacturer's instructions.

To replace the battery:

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Locate the battery socket (for the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components").
   
   

NOTICE: If you pry the battery out of its socket with a blunt object, be careful not to touch the system board with the object. Ensure that the object is inserted between the battery and the socket before you attempt to pry out the battery. Otherwise, you may damage the system board by prying off the socket or by breaking circuit traces on the system board.

3. Remove the battery by carefully prying it out of its socket with your fingers or with a blunt, nonconducting object such as a plastic screwdriver.
   
   

4. Insert the new battery into the socket with the side labeled "+" facing up, and snap the battery into place.
   
   

5. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

6. Connect your computer and devices to electrical outlets, and turn them on.
   
   
7. Properly dispose of the old battery. For more information, see your Product Information Guide.
   
   

VRM

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer.

NOTICE: A VRM must be installed to operate dual processors. To locate the VRM connector, see the system board components illustration (for the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components") or the system board label inside your computer.

Installing a VRM

CAUTION: Before you perform this procedure, follow the safety instructions located in the Product Information Guide.

NOTICE: Install the VRM after you have installed the processors.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Remove the processor airflow shroud.
   
   
3. Press the securing clips at each end of the VRM connector outward until they snap open.
   
   

To locate the VRM connector, see the system board components illustration (for the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components") or see the system board label inside your computer.

1	VRM
2	connector
3	securing clips (2)

4. Align the notch on the bottom of the VRM with the ridges inside the connector.
   
   
5. Press the VRM straight down into the connector until the securing clips snap into place at the ends of the module.
   
   
6. Install the processor airflow shroud.
   
   
7. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

8. Connect your computer and devices to electrical outlets, and turn them on.
   
   

Removing a VRM

CAUTION: Before you perform this procedure, follow the safety instructions located in the Product Information Guide.

NOTICE: Remove the VRM before you remove the processors.

1. Remove the processor airflow shroud.
   
   
2. Press the securing clips at each end of the connector outward simultaneously until the VRM slightly pops out from the connector.
   
   
3. Grasp the VRM by its top corners, and ease it out of the connector.
   
   
4. If you are installing a new VRM, see "Installing a VRM."
   
   

If you are not installing a new VRM, continue with step 5.

5. Install the processor airflow shroud.
   
   
6. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Connect your computer and devices to electrical outlets, and turn them on.
   
   

Control Panel

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Control Panel Components

1	control-panel connector
2	alignment hole
3	hard-drive access light
4	power button
5	screw hole

Removing the Control Panel

NOTICE: Before disconnecting a device from the computer or removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light for the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components."

1. Remove the front panel.
   
   
2. Disconnect the control-panel cable from the I/O panel connector.
   
   
3. Disconnect the I/O panel cable from the connector on the system board. To locate the system board connector on the Dell Precision 670 computer, see "System Board Components" and for the Dell Precision 470 computer, see "System Board Components."
   
   
4. Remove the mounting screw from the control panel.
   
   

Dell Precision 670 Workstation Computer

1	control panel
2	mounting screw

Dell Precision 470 Computer

1	control panel
2	mounting screw

5. Lift the control panel away from the computer.
   
   

Replacing the Control Panel

To replace the control panel, perform the removal procedure in reverse.

Front Panel

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

Removing the Front Panel

1. Disconnect and remove all drives (for the Dell Precision 670 computer, see "Drives for the Dell Precision 670 Computer" and for the Dell Precision 470 computer, see "Drives for the Dell Precision 470 Computer").
   
   
2. Release the front panel by pressing each of the front-panel release tabs.
   
   

Dell Precision 670 computers and Dell Precision 470 computers each have seven release tabs.

Dell Precision 670 Computer

Dell Precision 470 Computer

3. Close the computer cover halfway and pull the front panel away from the computer.
   
   

Replacing the Front Panel

To replace the front panel, perform the removal procedure in reverse.

I/O Panel

I/O Panel for the Dell Precision 670 Computer

1	audio connector	7	diagnostic lights (4)
2	control panel connector	8	IEEE 1394a connector
3	chassis-intrusion switch connector	9	USB 2.0 connectors (2)
4	front panel connector	10	microphone connector
5	speaker connector	11	headphone connector
6	front-panel IEEE 1394a connector

I/O Panel for the Dell Precision 470 Computer

1	chassis-intrusion switch connector	7	headphone connector
2	external speaker connector	8	IEEE 1394a connector
3	front-panel IEEE 1394a connector	9	USB 2.0 connector
4	audio cable connector	10	USB 2.0 connector
5	front panel connector	11	diagnostic lights (4)
6	control panel connector

Removing the I/O Panel

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Disconnect all cables that are connected to the I/O panel.
   
   

Note the routing of the control panel cable as you remove it from the computer so that you can replace it correctly.

3. From inside the computer cover, remove the mounting screw that secures the I/O panel to the computer.
   
   
4. Remove the I/O panel from the computer.
   
   

Dell Precision 670 Computer

Dell Precision 470 Computer

Replacing the I/O Panel

To replace the I/O panel, follow the removal procedures in the reverse order.

Power Supply for the Dell Precision 670 Computer

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer.

Removing the Power Supply

NOTICE: Before disconnecting a device from the computer, wait 10 to 20 seconds after disconnecting the computer from its electrical outlet. Before removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see "System Board Components."

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Remove the cards.
   
   
3. Remove the card guide:
   
   
   1. Pull up on the guide release button.
      
      
   2. Slide the guide to the right.
      
      
   3. Lift the guide out of the four securing slots in the computer.
      
      

1	release button
2	power cables
3	system board connector

4. While pressing the power-supply release button, slide the power supply toward the back of the computer.
   
   

1	power supply
2	power-supply securing tabs (5)
3	power-supply release button

5. Lift the power supply away from the computer.
   
   
6. Slide the power supply cables out of the computer (through the hole).
   
   

Replacing the Power Supply

1. Slide the power supply cables through the hole into the computer.
   
   
2. Insert the power-supply securing tabs into the power-supply securing slot on the computer, ensuring that each securing tab is connected to its slot on the computer.
   
   
3. Slide the power supply toward the front of the computer.
   
   
4. Install the card guide:
   
   
   1. Place the guide into the four securing slots in the computer.
      
      
   2. Slide the guide to the left until it locks into position.
      
      
5. Connect the power supply cables.
   
   
6. Close the cover.
   
   

Power Supply for the Dell Precision 470 Computer

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

Removing the Power Supply

NOTICE: Before disconnecting a device from the computer, wait 10 to 20 seconds after disconnecting the computer from its electrical outlet. Before removing a component from the system board, verify that the standby power light on the system board has turned off. To locate this light, see "System Board Components."

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Remove the card guide:
   
   
   1. Pull up on the guide release button.
      
      
   2. Slide the guide to the right.
      
      
   3. Lift the guide out of the four securing slots in the computer.
      
      

3. Disconnect the power supply cables from the system board.
   
   
4. Lift the handle on the power supply.
   
   
5. While pressing the release button, slide the power supply toward the front of the computer.
   
   

1	release button
2	power supply handle

6. Lift the power supply away from the computer.
   
   

Replacing the Power Supply

1. Insert the power-supply securing tabs into the power-supply securing slot on the computer, ensuring that each securing tab is connected to its slot on the computer.
   
   
2. Slide the power supply toward the back of the computer.
   
   
3. Connect the power supply cables.
   
   

System Board

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.

CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.

NOTICE: The system board and metal tray are connected and are removed as one piece.

Removing the System Board

1. Follow the procedures in "Removing and Replacing Parts."
   
   
2. Remove any components that restrict access to the system board.
   
   
3. Disconnect all cables from the system board.
   
   
4. Before you remove the existing system board assembly, visually compare the replacement system board to the existing system board to make sure that you have the correct part.
   
   
5. Remove the system board screw.
   
   

1	system board screw
2	tab
3	tab

6. Pull up on the two tabs, slide the system board assembly toward the front of the computer, and then lift the assembly up and away.
   
   
7. Place the system board assembly that you just removed next to the replacement system board.
   
   

Replacing the System Board

1. Transfer components from the existing system board to the replacement system board:
   
   
   1. Remove the memory modules and install them on the replacement board.
      
      

CAUTION: The processor package and heat-sink assembly can get hot. To avoid burns, ensure that the package and assembly have had sufficient time to cool before you touch them.

2. Remove the heat-sink assembly and processor from the existing system board and transfer them to the replacement system board.
   
   
2. Configure the settings of the replacement system board.
   
   
3. Set the jumpers on the replacement system board so they are identical to the ones on the existing board.
   
   

NOTE: Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the existing system board.

4. Orient the replacement board by aligning the notches on the bottom of the board with the tabs on the computer.
   
   
5. Slide the system board assembly toward the back of the computer until the assembly clicks into position.
   
   
6. Replace any components and cables that you removed from the system board.
   
   
7. Reconnect all cables to their connectors at the back of the computer.
   
   
8. Close the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

9. Connect your computer and devices to electrical outlets, and turn them on.
   
   

Closing the Computer Cover

1. Ensure that all cables are connected, and fold cables out of the way.
   
   
2. Ensure that no tools or extra parts are left inside the computer.
   
   
3. Pivot the cover down and into position.
   
   
4. Press down on the cover to close it.
   
   
5. Once the cover is closed, slide the release latch to the right until the latch clicks into place.
   
   

1	cover release latch
2	security cable slot
3	padlock ring

1	cover release latch
2	security cable slot
3	padlock ring

6. If you are using a padlock to secure your computer, install the padlock.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.

7. Connect your computer and devices to electrical outlets, and turn them on.
   
   

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