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Xp professional x64 edition windows – Asus P5N7A-VM User Manual

Page 31

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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

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.

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 Qualified 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)