System Memory - Asus H81M-V PLUS Manual

1.4
1.4.1
This motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Module
(DIMM) sockets. A DDR3 module has the same physical dimensions as a DDR2 DIMM but
is notched differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are
developed for better performance with less power consumption. The figure illustrates the
location of the DDR3 DIMM sockets:
H81M-V PLUS
H81M-V PLUS 240-pin DDR3 DIMM sockets
1.4.2
You may install 1GB, 2GB, 4GB, and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM
sockets.
ASUS H81M-V PLUS
E9408_H81M-V_PLUS_Guide.indb 7

System memory

Overview
Memory configurations
• 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.
• Memory modules with memory frequency higher than 2133 MHz and its corresponding
timing or the loaded X.M.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.
• Due to Intel chipset limitation, DDR3 1600MHz and higher memory modules on XMP
®
mode will run at the maximum transfer rate of DDR3 1600MHz.
• Due to the memory address limitation on 32-bit Windows
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:
- Use a maximum of 3GB system memory if you are using a 32-bit Windows
- I nstall a 64-bit Windows
motherboard.
- F or more details, refer to the Microsoft
com/kb/929605/en-us.
• This motherboard does not support DIMMs made up of 512 megabits (Mb) chips or
less.
Channel Sockets
Channel A DIMM_A1
DIMM_B1
Channel B
OS, when you install 4GB
®
OS if you want to install 4GB or more on the
®
support site at http://support.microsoft.
®
OS.
®
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