Memory Configurations - Asus P5Q - Motherboard - ATX User Manual

2.4.2

Memory configurations

You may install 512 MB, 1 GB, 2 GB and 4 GB unbuffered and non-ECC DDR2
DIMMs into the DIMM sockets.
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2-12
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
operating system may recognize less than 3GB. Hence, a total installed
memory of less than 3GB 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.
Windows XP Professional x64 Edition
®
Windows
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 3.4 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.
64-bit
Vista x64 Edition
®
Chapter 2: Hardware information
32-bit
®