Gigabyte GA-946GZ-DS3 Manual - Page 15

English Dual Channel Memory Configuration GA-946GZ-DS3 supports the Dual Channel Technology. After operating the Dual Channel Technology, the bandwidth of Memory Bus will add double. GA-946GZ-DS3 includes 4 DIMM sockets, and each Channel has two DIMM sockets as following: Channel 0 : DDRII1, DDRII2 Channel 1 : DDRII3, DDRII4 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 mode will not be enabled if only one/three DDRII memory module is installed. 2. To enable Dual Channel mode with two or four memory modules (it is recommended to use memory modules of identical brand, size, chips, and speed), install the memory according to the dual channel memory configuration table below (Figure 1). Dual Channel Memory Configuration Table (DS: Double Side, SS: Single Side, X: Empty) 2 memory modules 4 memory modules DDRII1 DS/SS DS/SS X X SS DDRII2 X X DS/SS DS/SS SS Figure 1 DDRII3 DS/SS X DS/SS X SS DDRII4 X DS/SS X DS/SS SS Memory configurations below will cause DDRII 667 memory to operate at 533 MHz (with 1066/800 MHz FSB CPU) and DDRII 533 at 400 MHz (with 800 MHz FSB CPU). (DS: Double Side, SS: Single Side, X: Empty) 2 memory modules 3 memory modules 4 memory modules DDRII1 SS X SS SS DS/SS X SS DDRII2 SS X SS SS X DS/SS SS Figure 2 DDRII3 X SS DS/SS X SS SS SS DDRII4 X SS X DS/SS SS SS SS Because of chipset limitations, do not populate both DIMM sockets of the same channel (e.g. DDRII1 and DDRII2) with double-sided memory modules to prevent system's failure to start or incorrect detection of memory modules. - 15 - Hardware Installation