2.4.2Memory Configurations

You may install 256 MB, 512 MB, 1 GB, 2 GB, or 4 GB registered ECC DDR DIMMs into the DIMM sockets using the memory configurations in this section.

• For dual-channel configuration, the total size of memory module(s) installed per channel must be the same for better performance.

Single CPU: DIMM_A1+DIMM_A2=DIMM_B1+DIMM_B2

Dual CPU: DIMM_A1+DIMM_A2=DIMM_B1+DIMM_B2=DIMM_A3+DIMM_B3

•When using one DDR DIMM module, install into DIMM_A1 slot only.

•When using two DDR DIMM modules, install into DIMM_A1 and DIMM_A2 slots only.

•Always install DIMMs with the same CAS latency. For optimum compatibility, it is recommended that you obtain memory modules from the same vendor.

•Visit the ASUS website for the latest DDR400 Qualified Vendors List (QVL).

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Chapter 2: Hardware setup