ASUS M5A99FX PRO R2.0 사용자 설명서

ASUS M5A99FX PRO R2.0

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

the DIMM sockets.

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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.

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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. 

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Memory modules with memory frequency higher than 2133MHz and their 

corresponding timing or the loaded XMP profile is not the JEDEC memory standard. 

The stability and compatibility of the memory modules depend on the CPU’s 

capabilities and other installed devices.

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Due to the CPU spec., AMD AM3 100 series CPUs support up to DDR3 1066MHz. 

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

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When overclocking, some AMD CPU models may not support DDR3 1600 or higher 

frequency DIMMs.

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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:
a)  Use a maximum of 3GB system memory if you are using a 32-bit Windows OS.
b)  Install a 64-bit Windows OS when you want to install 4GB or more on the 

motherboard.

c)  For more details, refer to the Microsoft

®

 support site at  http://support.microsoft.

com/kb/929605/en-us.

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This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less 

(Memory chip capacity counts in Megabit, 8 Megabit/Mb = 1 Megabyte/MB).

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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 3.4 Ai Tweaker menu for manual memory 

frequency adjustment.

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For system stability, use a more efficient memory cooling system to support a full 

memory load (4 DIMMs) or overclocking condition.