Asus P5N7A-VM 64-bit, Notes on memory limitations, P5N7A-VMMotherboard Qualified Vendors Lists (QVL) DDR2-667MHzcapability

• 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.

•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.

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.

64-bit

Windows® XP Professional x64 Edition

Windows® Vista x64 Edition

•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 Qualified Vendors Lists (QVL) DDR2-667MHz capability

Size	Vendor	Part No.	CL	Chip	SS/	Chip No.	DIMM support
				Brand	DS		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	•	•	•

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ASUS P5N7A-VM 1-19