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70 Removing and Installing Parts
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Memory
You can increase your computer memory by installing memory modules on the system board.
Your computer supports DDR2 memory. For additional information on the type of memory
supported by your computer, see "Memory" on page 109.
DDR2 Memory Overview
• DDR2 memory modules should be installed in
pairs of matched memory size, speed, and
technology
. If the DDR2 memory modules are not installed in matched pairs, the computer
will continue to operate, but with a slight reduction in performance. See the label on the
upper-right corner of the module to determine the module’s capacity.
NOTE: Always install DDR2 memory modules in the order indicated on the system board.
The recommended memory configurations are:
– A pair of matched memory modules installed in DIMM connectors 1 and 2
or
– A pair of matched memory modules installed in DIMM connectors 1 and 2 and another
matched pair installed in DIMM connectors 3 and 4
NOTICE: Do not install ECC memory modules.
• If you install mixed pairs of PC2-3200 (DDR2 400-MHz) and PC2-4200 (DDR2 533-MHz)
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.