Asus P3-P5G31 - Manual (Page 27)

2-11 ASUS P3-P5G31
2.5.1 Memory configurations
You may install 256 MB, 512 MB, 1 GB and 2 GB unbuffered non-ECC DDR2
DIMMs into the DIMM sockets.
• 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.
• Always install DIMMs with the same CAS latency. For optimum compatibility,
it is recommended that you obtain memory modules from the same vendor.
• If you are using a Windows 31-bit version operating system (e.g. 32-bit
Windows XP, 32-bit Windows Vista) without the Physical Address Extension
(PAE) support, the system will allocate a certain amount of memory space for
system devices.
• We recommend that you install only a maximum of 3GB system memory
when using a Windows 32-bit version operating system without the PAE.
The excess over 3GB of installed memory will not cause any problem;
however, the system can not use this excess memory space and the
system will display less than the total size of physical memory installed.
• This motherboard does not support memory modules made up of 128 Mb
chips or double sided x16 memory modules.
Notes on memory limitations
• Due to chipset limitation, this motherboard can only support up to
4 GB on the operating systems listed below. You may install a maximum
of 2 GB DIMMs on each slot, but only DDR2-800 and DDR2-667 2 GB
density modules are available for this configuration.
• Some old-version DDR2-800 DIMMs may not match Intel ®
On-Die-Termination (ODT) requirement and will automatically downgrade
to run at DDR-667. If this happens, contact your memory vendor to check
the ODT value.
32-bit 64-bit
Windows ® XP
Windows ® 2003 Server
Windows ® Vista
Windows ® XP x64 Edition
Windows ® 2003 Server x64 Edition
Windows ® Vista x64 Edition