Try dual channel, you may be surprised. It clocks higher (or you can try tighter timings) than triple. You have to muck around finding the "best" 2 slots out of the three though (usually 0/2 + 1/3). Kinda like x79 being better triple channel than quad... The extra channel is there for more bandwidth at intel rated speeds, its not always better when you push high mhz. I only discovered this when reading the x79 posts and having 4 x 2gb with one spare decided to play around, gained extra uncore mhz and mem mhz running 2+2 compared to triple.
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