1.7.2Memory 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 32-bit version operating system (e.g. 32-bit Windows XP, 32-bit Vista) without the Physical Address Extension (PAE) support, the system will allocate a certain amount of memory space for system device.

•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.

32-bit

64-bit

Windows® XP

Windows® XP x64 Edition

Windows®

2003 Server

Windows® 2003 Server x64 Edition

Windows®

Vista

Windows® Vista x64 Edition

•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 heppens, contact your memory vendor to check to ODT value.

ASUS P5KPL-CM

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