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2 memory configurations, Memory configurations -12 – Asus M5A78L/USB3 User Manual

Page 22

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1.7.2

Memory 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.

• We recommend that you install the memory modules from the blue slots for better

overclocking capability.

• AMD

®

FX™ Series CPU on this motherboard supports up to DDR3 1866MHz as its

standard memory frequency.

• Due to the CPU specification, AMD

®

100 and 200 series CPUs support up to DDR3

1066MHz. With ASUS design, this motherboard can support up to DDR3 1333MHz.

• When overclocking, some AMD CPUs may not support DDR3 1600MHz or higher

frequency DIMMs.

• 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

followings:

-

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.

M5A78L series Motherboards Qualified Vendors Lists (QVL)
DDR3-2000(O.C.) MHz capability

Vendor

Part No.

Size

SS/

DS

Chip

Brand

Chip

NO.

CL

Voltage

DIMM support

A*

B*

C*

Transcend TX2400KLU-4GK(XMP)

4GB ( 2x 2GB ) DS

-

-

9-11-9-28

1.65V

Vendor

Part No.

Size

SS/

DS

Chip

Brand

Chip

NO.

CL

Voltage

DIMM support

A*

B*

C*

Corsair

CMT4GX3M2A1866C9(XMP)

4GB(2 x 2GB)

DS

-

-

9-9-9-24

1.65V

Kingston

KHX1866C9D3T1K3/3GX(XMP) 3GB(3 x 1GB)

SS

-

-

-

1.65V

Kingston

KHX1866C9D3T1K3/6GX(XMP) 6GB(3 x 2GB)

SS

-

-

-

1.65V

OCZ

OCZ3G1866LV4GK

4GB(2 x 2GB)

DS

-

-

10-10-10-27

1.65V

OCZ

OCZ3P1866LV4GK

4GB(2 x 2GB)

DS

-

-

9-9-9-27

1.65V

DDR3-1866(O.C.)MHz capability

Chapter 1: Product introduction

1-12

This manual is related to the following products: