Asus P5KPL-AM User Manual - Page 23

Memory configurations - in gb

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1.7.2 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. • Due to the memory address limitation on the 32-bit Windows® OS, when you install 4GB or more memory on the motherboard, the actual usable memory for the OS can be about 3GB or less. For effective use of memory, we recommend that you install a 64-bit Windows® OS when 4GB or more memory is installed on the motherboard. • This motherboard does not support DIMMs made up of 256 megabit (Mb) chips or less. 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 Windows® XP Windows® Vista 64-bit Windows® XP x 64 Edition Windows® Vista x 64 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 the ODT value. ASUS P5KPL-AM 1-13

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ASUS P5KPL-AM
1-13
1.7.2
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.
•
Due to the memory address limitation on the 32-bit Windows
®
OS, when you install
4GB or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you install a 64-bit
Windows
®
OS when 4GB or more memory is installed on the motherboard.
•
This motherboard does not support DIMMs made up of 256 megabit (Mb) chips or
less.
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 heppens,
contact your memory vendor to check the ODT value.
32-bit
64-bit
Windows
®
XP
Windows
®
XP x 64 Edition
Windows
®
Vista
Windows
®
Vista x 64 Edition