Chapter 1 – Asus Crosshair V Formula-Z User Manual

Page 26

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Chapter 1: Product introduction

Chapter 1

Memory configurations

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

8GB unbuffered and non-ECC DDR3 DIMMs into the

unbuffered and non-ECC DDR3 DIMMs into the

DIMM sockets.

•

Memory module with memory frequency higher than 2133 MHz and its corresponding

timing or the loaded XMP or D.O.C.P. profile is not the JEDEC memory standard. The

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

and other installed devices.

•

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 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:
a) Use a maximum of 3GB system memory if you are using a 32-bit Windows OS.

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

Install a 64-bit Windows OS when you want to install 4GB or more on the

nstall 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 3.3 Extreme Tweaker menu for manual memory

frequency adjustment.

•

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

memory load (4 DIMMs) or overclocking condition.