For information on the type of memory supported by your computer, see "Specifications."
Memory modules should be installed in pairs of matched memory size, speed, and technology. If the memory modules are not installed in matched pairs, the computer will continue to operate, but with a slight reduction in performance. See the label in the upper-right corner of the module to determine the module's capacity.
NOTE: Always install memory modules in the order indicated on the system board.
The recommended memory configurations are:
A pair of matched memory modules installed in connectors DIMM_1 and DIMM_2
or
A pair of matched memory modules installed in connectors DIMM_1 and DIMM_2 and another matched pair installed in connectors DIMM_3 and DIMM_4
If you install mixed pairs of DDR2 400-MHz (PC2-3200) and DDR2 533-MHz (PC2-4300) memory, the modules function at the slowest speed installed.
Be sure to install a single memory module in DIMM connector 1, the connector closest to the processor, before you install modules in the other connectors.
While installing memory modules, ensure that you do not mix ECC and non-ECC memory.
A
matched pair of memory modules in connectors DIMM_1 and DIMM_2 (white securing clips)
B
matched pair of memory modules in connectors DIMM_3 and DIMM_4 (black securing clips)
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 either in
connectors DIMM1 and DIMM2 or connectors DIMM3 and DIMM4.
Addressing Memory With 4-GB Configurations
Your computer supports a maximum of 4 GB of memory when you use four 1-GB DIMMs. Current operating systems, such as Microsoft® Windows XP, can only use a maximum of 4 GB of address space; however, the amount of memory available to the operating system is less than 4 GB. Certain components within the computer require address space in the 4-GB range. Any address space reserved for these components cannot be used by computer memory.
The following components require memory address space:
System ROM
APIC(s)
Integrated PCI devices, such as network connectors, SCSI controllers, and IEEE 1394 controllers
PCI or PCI Express devices/cards
At start-up, the BIOS identifies the components that require address space. The BIOS dynamically calculates the amount of reserved address space required. The BIOS then subtracts the reserved address space from 4 GB to determine the amount of usable space.
If the total installed computer memory is less than the usable space, all installed computer memory is available for use only by the operating system.
If the total installed computer memory is equal to or greater than the usable address space, a small portion of installed memory is available for use by the operating system.
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.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into
the computer.
Connect your computer and devices to electrical outlets, and turn them on.
Press <F2> to enter system setup and check the value for System Memory.
The computer should have changed the value of System Memory to reflect the newly installed memory. Verify the new total. If it is correct, skip to step 9.
If the memory total is incorrect, turn off and disconnect your computer and devices from
their electrical outlets. Open the computer cover and check the installed memory modules to
ensure that they are seated properly in their sockets. Then repeat steps 5, 6, and 7.
When the System Memory total is correct, press <Esc> to exit system setup.
Run the Dell Diagnostics to verify that the memory modules are operating properly.
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.
