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Adding Parts 75
Adding Memory
You can increase your computer memory by installing memory modules on the system board.
NOTE: DDR 333 memory operates at 320 MHz when used with an 800-MHz front-side bus.
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.
NOTE: Always install DDR memory modules in the order indicated on the system board.
The recommended memory configurations are:
• Install a pair of matched memory modules in connectors DIMM1 and DIMM2.
or
• Install a pair of matched memory modules in connectors DIMM1 and DIMM2 and another
matched pair in connectors DIMM3 and DIMM4.
• Do not install ECC memory modules.
• If you install mixed pairs PC2700 (DDR 333-MHz) and PC3200 (DDR 400-MHz) memory,
the modules function at the slowest speed installed.
• 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
matched pair of memory modules
in connectors DIMM3 and DIMM4
matched pair of memory modules
in connectors DIMM1 and DIMM2