Gigabyte GA-945PL-S3 Manual - Page 15

English Dual Channel Memory Configuration GA-945PL-DS3/GA-945PL-S3 supports the Dual Channel Technology. After operating the Dual Channel Technology, the bandwidth of Memory Bus will add double. GA-945PL-DS3/GA-945PL-S3 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 in Figure 2 will result in memory frequency being reduced from 533MHz down to 400MHz. (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 with double-sided memory modules to prevent system's failure to start or incorrect detection of memory modules, - 15 - Hardware Installation