Asus P5Q-VM DO - Manual (Page 13)

1.4.2 Memory configurations
You may install a 512MB, 1GB, 2GB, and 4GB unbuffered non-ECC DDR2 DIMM into the
DIMM socket.
P5Q-VM DO Motherboard Qualified Vendors List (QVL)
DDR2-800MHz capability
• 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.
• For dual-channel configuration, you can:
-
install two identical DIMMs in DIMM_A1 and DIMM_B1; or
- install four identical DIMMs in all four slots; or
- install one identical DIMM pair in DIMM_A1 and DIMM_B1 (yellow slots) and
another identical DIMM pair in DIMM_A2 and DIMM_B2 (black slots).
• Due to the memory address limitation on the 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 either 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 256 megabits (Mb) chips or less.
• This motherboard supports up to 16GB on Windows indows ® XP Professional x64 and
Windows ® Vista x64 editions. You may install a maximum of 4GB DIMMs on each slot. . You may install a maximum of 4GB DIMMs on each slot.
• 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.
• For system stability, use a more efficient cooling system to support a full memory load (4
DIMMs) or overclocking conditions.
continued on the next page
Vendor Part No. Size
SS/
DS
Chip
Brand
Chip No.
Timing
DIMM
(BIOS)
Voltage
DIMM Support
A* B* C*
A-Data AD2800E001G0U 2048MB(Kit of 2) SS N/A Heat-Sink Package 4-4-4-12 2.0~2.1V • • •
A-Data M2GVD6G314170Q1E58 1024MB DS VDATA VD29608A8A-25EG80813 • •
A-Data AD2800002GMU 2048MB DS Hynix Heat-Sink Package • • •
A-Data AD2800E002GOU 4096MB(Kit of 2) DS N/A Heat-Sink Package 4-4-4-12 1.9~2.1V • • •
Apacer 78.91G91.9K5 512MB SS Apacer AM4B5708JQJS8E0751C 5 • •
Apacer 78.01GA0.9L5 1024MB SS Apacer AM4B5808FEWS8E0909C 5 • • •
Corsair CM2X1024-6400 1024MB DS Corsair Heat-Sink Package • •
Corsair XMS2-6400 1024MB DS Corsair Heat-Sink Package 4 • • •
Chapter 1: Product introduction 1-4