User Guide

2.5.2 DDR2 Memory Slots
This motherboard provides four 240-pin DIMM slots for Dual Channel DDR2 800/667/533
memory modules with memory expansion size up to 8GB.
• To reach the optimum performance in dual-channel configurations, install identical DDR2
DIMM pairs for each channel.
• Install DIMMs with the same CAS latency. To reach the optimum compatibility, obtain
memory modules from the same vendor.
• Due to chipset resource allocation, the system may detect less than 4GB of system memory
in the installation of four 1GB DDR2 memory modules.
※ Usually there is no hardware or BIOS setup required after adding or removing
memory modules, but you will have to clear the CMOS memory first if any
memory module related problem occurs.
There are several methods of different DDR2 configurations depending on how the DIMMs are
populated on each system memory channel:
• [Single Channel]: only one channel is populated.
Channel A Channel B
Method
DIMM1 DIMM2 DIMM3 DIMM4
1 512MB - - -
2 - 512MB - -
3 - - 512MB -
4 - - - 512MB
5 512MB 512MB - -
6 - - 512MB 512MB
2-12 AB9 Pro, AB9