Gigabyte GA-8S655TX Ultra User Manual page 19

2. Two DDR memory modules are installed (the same memory size and type): 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. Additionally, you can boot the system only when one of the
memory modules is inserted into Channel A or Channel B. On the other hand, the memory
module must be inserted into any sockets.
3. Four DDR memory modules are installed: If you install four memory modules at the same
time, the Dual Channel Technology will operate only when those modules have the same
memory size and type.
We'll strongly recommend our user to slot into two DDR memory modules into the DIMMs with the
same color in order for Dual Channel Technology to work.
The following table is for Dual Channel Technology combination:
l Figure 1: Dual Channel Technology (DS: Double Side, SS: Single Side)
DIMM 1
2 memory modules DS/SS
DS/SS
X
X
4 memory modules DS/SS
DIMM 2 DIMM 3
X DS/SS
X X
DS/SS DS/SS
DS/SS X
DS/SS DS/SS
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DIMM 4
X
DS/SS
X
DS/SS
DS/SS
Hardware Installation Process