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72 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 "Specifications."
Memory Overview
• 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), DDR2 533-MHz (PC2-4300) and
DDR2 667-MHz (PC2-5300) memory, the modules function at the slowest speed installed.
• Be sure to install a single memory module in the DIMM_1 connector, 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.