Gigabyte GA-7N400 User Manual - Page 23
Dual Channel DDR
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English Dual Channel DDR: GA-7N400 Pro2 / GA-7N400 / GA-7N400-L support Dual Channel Technology. When Dual Channel Technology is activated, the bandwidth of memory bus will be double the original one, with the fastest speed at 6.4GB/s(DDR400) . GA-7N400 Pro2 / GA-7N400 / GA-7N400-L include 4 DIMM slots, and each Channel has 2 DIMMs as following: Channel A : DIMM 1, 2 Channel B : DIMM 3, 4 Below are the explanations: If you want to operate the Dual Channel Technology, please note the following explanations due to the limitation of Intel chipset specifications. 1. Only one DDR memory module is installed: The Dual Channel Technology can't operate when only one DDR memory module is installed. 2. Two DDR memory modules are installed: The Dual Channel Technology will operate when two memory modules are inserted individually into Channel A and B. If you install two memory modules in the same channel, the Dual Channel Technology will not operate. 3. Three or Four DDR memory modules are installed: Please follow figure 1 to achieve the Dual Technology. The following tables include all memory-installed combination types: (Please note that those types not in the tables will not boot up.) l Figure 1: Dual Channel Technology (DS: Double Side, SS: Single Side) DIMM 1 DIMM 2 DIMM 3 2 memory modules DS/SS X DS/SS X DS/SS DS/SS DS/SS X X X DS/SS X 3 memory modules DS/SS DS/SS DS/SS DS/SS DS/SS X X DS/SS SS DS/SS X SS 4 memory modules DS/SS DS/SS SS DIMM 4 X X DS DS X DS SS SS SS l Figure 2: Non Dual Channel Technology (DS: Double Side, SS: Single Side) DIMM 1 DIMM 2 DIMM 3 DIMM 4 1 memory module DS/SS X X X X DS/SS X X X X DS/SS X X X X DS 2 memory modules DS/SS DS/SS X X X X SS SS If memories are inserted on dimm3 and dimm4 at the same time, please note that the memories must be exactly identical in device, type, size and single side. This is enssential to let system boot up correctly - 19 - Hardware Installation Process 7n400pro2_1002_q.p65 19 2003/7/4, ¤U¤È 03:27