Asus P5QL-EM - Motherboard - Micro ATX, Руководство пользователя

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1-12 Chapter 1: Product introduction
1.7.2 Memory configurations
You may install 256MB, 512MB, 1GB and 2GB 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 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 having 4GB or more memory installed on the motherboard.
• Due to chipset limitation, this motherboard only supports up to the total of four ranks (four
sides in total) of RAM at max.
• This motherboard does not support DIMMs made up of 256 megabit (Mb) chips or less.
Mode DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
One DIMM DS/SS - - -
- DS/SS - -
- - DS/SS -
- - - DS/SS
Two DIMMs DS/SS - DS/SS -
DS/SS - - DS/SS
- DS/SS DS/SS -
- DS/SS - DS/SS
Three DIMMs SS SS DS/SS -
SS SS - DS/SS
DS/SS - SS SS
- DS/SS SS SS
Four DIMMs SS SS SS SS
• When using only one memory module, start installing the DDR2 DIMM from slot
DIMM_A1 or DIMM_B1 for better overclocking capability.
• For dual-channel configuration, you may:
- install identical DIMMs in all four sockets OR
- install identical DIMM pair in DIMM_A1 and DIMM_B1 (yellow sockets) and
another identical DIMM pair in DIMM_A2 and DIMM_B2 (black sockets)
• Always use identical DDR2 DIMM pairs for dual channel mode. For optimum
compatibility, we recommend that you obtain memory modules from the same vendor.