Manuals

Memory: OptiPlex 4xxLe (4XXDL)

Memory Installation Guidelines | Base/Board Memory | Installing/Removing Memory | Installing/Removing Cache Memory | Upper Memory Map | Conventional Memory Map

Memory Installation Guidelines:

• The 2 SIMM sockets can accommodate from 4 to 64 MB of RAM.
  
  
• Supported SIMM sizes are 4, 8, 16, and 32 MB, rated at 70 ns or better.
  
  
• SIMMs are 32-bit parity or nonparity.

SIMM Sockets

Base/Board Memory

NOTE: The SIMM sockets do not have to be filled in any specific order. A single SIMM can be installed in either socket.

Installing/Removing Memory

Installing a SIMM

1. Remove the computer cover.
   
   
2. Hold the SIMM at a 45-degree angle and with the cutout facing the back of the chassis. Align the SIMM's edge connector with the slot in the center of the SIMM socket.
   
   
3. Press the SIMM's edge connector firmly into the SIMM socket.
   
   
4. Pivot the SIMM up until it clicks into place.

Removing a SIMM

1. Remove the computer cover.
   
   
2. While pushing outward on each of the SIMM socket's metal tabs, rotate the SIMM upward until it is released from its socket.

Installing/Removing Cache Memory

Systems with SL Enhanced Intel486™ SX or SL Enhanced IntelSX2™ microprocessors can be upgraded with cache memory. (This cache memory is standard on systems with SL Enhanced IntelDX2™ and SL Enhanced IntelDX4™ microprocessors.) The cache memory contains 128 KB of high-speed SRAM that serves as an intermediate storage area between the microprocessor and the system memory. This high-speed memory enhances the speed of many microprocessor operations by storing frequently used microprocessor instructions.

Installing Cache Memory

Installing Cache Memory

1. Remove the computer cover.
   
   
2. Remove the expansion-card cage.
   
   
3. Unpack and identify the cache chips. The cache directory chip has 28 pins and a "-15" at the end of its part number.
   
   
4. Install the cache directory chip into socket U2. Orient the chip to match the notch at one end of the chip with the corresponding notch in the cache socket. Then press the chip into place.
   
   
5. Install the 2 cache buffer chips into sockets U57 and U55. The cache buffer chips are the two 20-pin chips. They are 2/3 the length of the 28-pin chips.
   
   
6. Install the 4 cache-memory upgrade chips in sockets U52, U59, U60, and U68.
   
   
7. To check that the cache is installed correctly, enter the System Setup program and verify that the External Cache category displays 128 KB. The system automatically detects the presence of cache memory installed in the system.

Removing Cache Memory

1. Remove the computer cover.
   
   
2. Remove the expansion-card cage.
   
   
3. Note the orientation of the cache chips to be removed, and then remove the chips from sockets U52, U59, U60, and U68. Using the chip-removal tool, gently pull up until the chip is removed from the system board.

Upper Memory Map

Conventional Memory Map