Asus P5N7A-VM Computer Hardware User Manual


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ASUS P5N7A-VM 1-19
• 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
conguration. 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.
• When installing total memory of 4GB capacity or more, Windows
®
32-bit
operation system may only 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 128 Mb
chips.
64-bit
Windows
®
XP Professional x64 Edition
Windows
®
Vista x64 Edition
Notes on memory limitations
• 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.
• Some old-version DDR2-800 DIMMs may not match Intel
®
’s
On-Die-Termination (ODT) requirement and will automatically downgrade
to run at DDR2-667. If this happens, contact your memory vendor to check
the ODT value.
• Due to chipset limitation, DDR2-800 with CL=4 will be downgraded to run
at DDR2-667 by default setting. If you want to operate with lower latency,
adjust the memory timing manually.
P5N7A-VM Motherboard Qualied Vendors Lists (QVL)
DDR2-667MHz capability
Size Vendor Part No. CL
Chip
Brand
SS/
DS
Chip No.
DIMM support
A* B* C*
2G Kingston KVR667D2N5/2G N/A Micron DS 7RE22 D9HNL • •
512MB Kingston KVR667D2N5/512 N/A Kingston SS SO1237650821 SBP D6408TR
4CGL25USL074905PECNB
• • •
2G Kingston KVR667D2N5/2G N/A Elpida DS E1108ACBG-8E-E 0813A90CC • •
1G Kingston KVR667D2N5/1G N/A Kingston DS SO1280420822 SOP D6408TR
4CGL25USL156304PECXA
• • •
512MB Qimonda HYS64T64000EU-3S-B2 5 Qimonda SS HYB18T512B00B2F3SFS
S28171
• • •
1G Qimonda HYS64T128020EU-3S-B2 5 Qimonda DS HYB18T512B00B2F3SFS
S28171
• •
1G Corsair XMS2-5400 4 Corsair DS Heat-Sink Package • • •
(continued on the next page)
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