1.7.2Memory configurations

You may install 512MB, 1GB, 2GB, and 4GB unbuffered ECC and non-ECC DDR3 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, we recommend 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 do any of the following:

-Install a maximum of 3GB system memory if you are using a 32-bit Windows® OS.

-Use a 64-bit Windows® OS if you want to install 4GB or more memory on the motherboard.

•This motherboard does not support DIMMs made up of 256 megabits (Mb) chips or less.

M4A77T Motherboard Qualified Vendors Lists (QVL)

DDR3-1866(O.C.)MHz capability

Vendor

Part No.

Size

SS/

Chip

Chip NO.

CL

DIMM support

DS

Brand

A*

B*

C*

 

 

 

 

 

 

 

 

 

 

 

 

Kingston

KHX14900D3K3/3GX(XMP)

3072MB(kit of 3)

SS

N/A

Heat-Sink Package

9-9-9-27

•

•

 

DDR3-1800(O.C.)MHz capability

Vendor

Part No.

Size

SS/

Chip

Chip NO.

CL

 

DIMM support

 

 

 

DS

Brand

 

 

A*

B*

C*

 

 

 

 

 

 

 

Corsair

CM3X2G1800C8D

2048MB

DS

N/A

Heat-Sink Package

N/A

•

•

 

Kingston

KHX14400D3K2/2G

2048MB(Kit of 2)

SS

N/A

Heat-Sink Package

8-8-8-24

•

•

 

Kingston

KHX14400D3K3/3GX(XMP)

3072MB(kit of 3)

SS

N/A

Heat-Sink Package

9-9-9-27

•

•

 

Kingston

KHX14400D3K2/2GN(EPP)

4096MB(kit of 2)

DS

N/A

Heat-Sink Package

8-8-8-24

•

 

 

ASUS M4A77T

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