Asus F1A55-M LK R2.0 User Manual download pdf (Page 22)

• 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 optimal compatibility, we

recommend that you install memory modules of the same version or date code (D/C)

from the same vendor. Check with the retailer to get the correct memory modules.

• 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 512 megabits (Mb) chips or less.

• The maximum 32GB memory capacity can be supported with 16GB or above DIMMs.

ASUS will update the memory QVL once the DIMMs are available in the market.

1.7.2 Memory congurations

You may install 1GB, 2GB, 4GB, and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM

sockets.

• The default memory operation frequency is dependent on its Serial Presence Detect

(SPD), which is the standard way of accessing information from a memory module.

Under the default state, some memory modules for overclocking may operate at a

lower frequency than the vendor-marked value. To operate at the vendor-marked or at a

higher frequency, refer to section 2.4 Ai Tweaker menu for manual memory frequency

adjustment.

• For system stability, use a more efcient memory cooling system to support a full

memory load (2 DIMMs) or overclocking condition.

F1A55-M LK R2.0 Motherboard Qualied Vendors Lists (QVL)

DDR3-1866 MHz capability

Vendors Part No. Size SS/DS

Chip

Brand

Chip No. Timing Voltage

DIMM socket support

(Optional)

A* B*

CORSAIR CMT4GX3M2A1866C9(XMP) 4GB(2 x 2GB) DS - - 9-9-9-24 1.65V • •

CORSAIR CMT6GX3MA1866C9(XMP) 6GB(3 x 2GB) DS - - 9-9-9-24 1.65V • •

CORSAIR CMZ8GX3M2A1866C9(XMP) 8GB(2 x 4GB) DS - - 9-10-9-27 1.50V • •

G.SKILL F3-14900CL9D-8GBXL(XMP) 8GB(2 x 4GB) DS - - 9-10-9-28 1.5V • •

KINGSTON KHX1866C9D3T1K3/3GX(XMP) 3GB(3 x 1GB) SS - - - 1.65V • •

KINGSTON KHX1866C9D3T1K3/6GX(XMP) 6GB(3 x 2GB) DS - - - 1.65V • •

Chapter 1: Product introduction1-12

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Asus F1A55-M LK R2.0 User Manual Page 22

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