Memory Configurations - Asus P8H77-V LE Manual

1.7.2

Memory configurations

You may install 1GB, 2GB, 4GB and 8GB unbuffered 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.
• 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
- Install a 64-bit Windows
motherboard.
• This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.
• The maximum 32GB memory capacity can be supported with 8GB or above DIMMs.
ASUS will update the memory QVL once the DIMMs are available in the market.
• 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 efficient memory cooling system to support a full
memory load (4 DIMMs) or overclocking condition.
P8H77-V LE Motherboard Qualified Vendors Lists (QVL)
DDR3 1866 MHz capability
Vendors Part No.
A-DATA AX3U1866PB2G8-DP2(XMP)
CORSAIR CMT4GX3M2A1866C9(XMP)
CORSAIR CMT6GX3MA1866C9(XMP)
CORSAIR CMZ8GX3M2A1866C9(XMP)
G.SKILL F3-14900CL9D-8GBXL(XMP)
G.SKILL F3-14900CL9Q-8GBXL(XMP)
KINGSTON KHX1866C9D3T1K3/3GX(XMP) 3GB (3 x 1GB)
KINGSTON KHX1866C9D3T1K3/6GX(XMP) 6GB (3 x 2GB)
Due to the CPU behavior, DDR3 1866 MHz memory module will run at DDR3
1800 MHz frequency as default.
Chapter 1: Product introduction
OS when you want to install 4GB or more on the
®
SS/ Chip Chip
Size
DS Brand NO.
2GB DS - -
4GB (2 x 2GB) DS - -
6GB (3 x 2GB) DS - -
8GB (2 x 4GB) DS - -
8GB (2 x 4GB) DS - -
8GB (4 x 2GB) DS - -
SS - -
DS - -
OS, when you install 4GB
®
DIMM socket support (Optional)
Timing Voltage
1 DIMM 2 DIMMs
8-8-8-24 1.55V-1.75V •
9-9-9-24 1.65V •
9-9-9-24 1.65V •
9-10-9-27 1.50V •
9-10-9-28 1.5V •
9-9-9-24 1.6V •
- 1.65V •
- 1.65V •
OS.
®
4 DIMMs
• •
•
• •
• •
• •
• •
• •
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