Gigabyte GA-8I955X Pro User Manual page 15

If you want to operate the Dual Channel Technology, please note the following explanations due to the
limitation of Intel chipset specifications.
1. Dual channel memory cannot be used if one or three DDR II memory modules are installed.
2. To enable Dual Channel mode with 2 or 4 memory modules, it is recommended to use
memory modules of identical brand, size, chips, and speed.
We'll strongly recommend our user to slot two DDR II memory modules into the DIMMs of the same
color in order for Dual Channel Technology to work.
The following table is for Dual Channel Technology combination: (DS: Double Side, SS: Single Side)
2 memory modules
4 memory modules
Fig.1
The DIMM socket has a notch, so the DIMM memory module can only
fit in one direction. Insert the DIMM memory module vertically into the
DIMM socket. Then push it down.
Fig.2
Close the plastic clip at both edges of the DIMM sockets to lock the
DIMM module.
Reverse the installation steps when you wish to remove the DIMM
module.
Dual Channel DDR II
GA-8I955X Royal/Pro supports the Dual Channel Technology. After operat-
ing the Dual Channel Technology, the bandwidth of Memory Bus will double.
DDR II 1 DDR II 2
DS/SS X
X DS/SS
DS/SS DS/SS
- 15 -
DDR II 3 DDR II 4
DS/SS X
X DS/SS
DS/SS DS/SS
Hardware Installation