Gigabyte GA-8I945GMBX User Manual page 15

The GA-8I945GMBX includes 4 DIMM sockets, and each Channel has 2 DIMM sockets as following:
Channel A : DDR II 1, DDR II 2
Channel B : DDR II 3, DDR II 4
Due to chipset limitation, if you want to operate the Dual Channel Technology, please follow the guidelines
below for Dual Channel memory configuration.
1. Dual channel memory cannot be used if one or three DDR II memory modules are installed.
2. If two DDR II memory modules are installed (same storage capacity), one must be added to the
Channel A slot and the other in the Channel B slot in order to use dual channel memory. Dual
channel memory cannot function if both DDR II memory modules are installed on the same channel.
3. If four DDR II memory modules are installed, please use memory of the same storage capacity in
order to use dual channel memory and for BIOS to detect all the DDR II memory modules.
We'll strongly recommend our user to slot two DDR II memory modules into the DIMMs with the same color
in order for Dual Channel Technology to work.
The following is a Dual Channel Memory configuration table: (DS: Double Side, SS: Single Side)
DDR II 1
2 memory modules DS/SS
X
4 memory modules DS/SS
Dual Channel DDR II Memory Configuration
The GA-8I945GMBX supports the Dual Channel Technology. When the Dual
Channel Technology is activated, the bandwidth of memory bus will be double
the original one.
DDR II 2
X
DS/SS
DS/SS
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DDR II 3 DDR II 4
DS/SS X
X DS/SS
DS/SS DS/SS
Hardware Installation