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DDR Memory Overview
DDR memory modules should be installed in pairs of matched memory size. This means that if you purchased your computer with 128 MB of memory installed
and you want to add another 128 MB of memory, you should install it in the appropriate connector. If the DDR memory modules are not installed in matched
pairs, the computer will continue to operate, but with a slight reduction in performance.
The recommended memory configurations are:
l Install a pair of matched memory modules in connectors DIMM1 and DIMM2.
or
l Install a pair of matched memory modules in connectors DIMM1 and DIMM2 and another matched pair in connectors DIMM3 and DIMM4.
l Do not install ECC memory modules.
l If you install mixed pairs PC2700 (DDR 333-MHz) and PC3200 (DDR 400-MHz) memory, the modules function at the slowest speed installed.
l Be sure to install a single memory module in DIMM 1 or the connector closest to the processor before you install modules in the other connectors.
Memory Installation Guidelines
Installing Memory
1. Follow the procedures in "Before You Begin."
2. Lay the computer on its side so that the system board is on the bottom of the inside of the computer.
3. If necessary, remove a memory module:
a. Press out the securing clip at each end of the memory module connector.
b. Grasp the module and pull up.
NOTE: Always install DDR memory modules in the order indicated on the system board.
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. You should install your original memory modules in pairs either in connectors DIMM1
and DIMM2 or connectors DIMM3 and DIMM4. If possible, do not pair an original memory module with a new memory module. Otherwise, your computer
may not function at optimal performance.
NOTE: Memory purchased from Dell is covered under your computer warranty.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in your Owner's Manual or Product Information
Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.
NOTE: For easier access to the memory modules, remove the AGP card first.