Dell XPS /Dimension - Removing and Installing Parts; DDR Memory Overview

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Removing and Installing Parts
Dell™Dimension™XPSSeriesServiceManual
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Memory
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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."
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DDR Memory Overview
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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.
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The recommended memory configurations are:
l A pair of matched memory modules installed in connectors DIMM1 and DIMM2
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or
l A pair of matched memory modules installed in connectors DIMM1 and DIMM2 and another matched pair installed in connectors DIMM3 and DIMM4
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Additional memory recommendations include:
l Do not install ECC memory modules.
l 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.
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.
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Memory
PCI Cards
AGP Cards
Drives
Microprocessor Airflow Shroud
Microprocessor
System Board
Power Supply
Front Panel
Battery
Drive Door
NOTE: DDR 333 memory operates at 320-MHz when used with an 800-MHz front-side bus processor.
NOTE: Always install DDR memory modules in the order indicated on the system board.