Dell XPS/Dimension XPS - Manual (Page 86)

86 Removing and Installing Parts
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Memory
You can increase your computer memory by installing memory modules on the system
board. For information on the type of memory supported by your computer, see "Memory"
on page 120.
NOTE: DDR 333 memory operates at 320-MHz when used with an 800-MHz front-side bus
processor.
DDR Memory Overview
DDR memory modules should be installed in pairs of matched memory size. This means that
if you purchased your computer with 256 MB of memory installed and you want to add
another 256 MB of memory, you must 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.
NOTE: Always install DDR memory modules in the order indicated on the system board.
The recommended memory configurations are:
• A pair of matched memory modules installed in connectors DIMM1 and DIMM2
or
• A pair of matched memory modules installed in connectors DIMM1 and DIMM2 and
another matched pair installed in connectors DIMM3 and DIMM4
Additional memory recommendations include:
• Do not install ECC memory modules.
• If you install mixed pairs PC2700 (DDR 333-MHz) and PC3200 (DDR 400-MHz) of
memory modules, they function at the slowest speed of the modules you install.
• 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.
G0550bk1.book Page 86 Thursday, July 10, 2003 1:55 PM