Asus P5Q-EM 1.7.2Memory configurations, 64-bit, DRAM Frequency, 2.4 Ai Tweaker menu

1.7.2Memory configurations

You may install 512 MB, 1 GB, 2 GB, and 4 GB non‑ECC, unbuffered, DDR2 DIMMs into the DIMM sockets.

• Due to chipset behavior, to obtain memory frequency higher than DDR2 800, you can manually adjust DRAM Frequency in BIOS settings. Refer to 2.4 Ai Tweaker menu for details.

• You may install varying memory sizes in Channel A and Channel B. The system maps the total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is then mapped for single-channel operation.

• It is recommended to install the memory modules from the yellow slots for better overclocking capability.

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

• When installing total memory of 4GB capacity or more, Windows® 32-bit

operation system may only recognize less than 3GB. Hence, a total installed memory of less than 3 GB is recommended.

• This motherboard does not support memory modules made up of 256 Mb chips.

• Due to chipset limitation, this motherboard can only support up to 16 GB on the operating systems listed below. You may install a maximum of 4 GB DIMMs on each slot.

64-bit

Windows® XP Professional x64 Edition

Windows® Vista x64 Edition

•The default memory operation frequency is dependent on its SPD. Under the default state, some memory modules for overclocking may operate at a lower frequency than the vendor-marked value. To operate at the vendor- marked or at a higher frequency, see section 2.4 Ai Tweaker menu for manual memory frequency adjustment.

•The memory modules may require a better cooling system to work stably under full loading (4 DIMMs) or overclocking setting.

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