Maybe he just wants to run them at stock speeds Zsam. I'm using the 4gb Corsair Dominators PC12800C8 on the REX Nurce_BC... there's no overclock potential though on my rev... For benching I use the 2Gb CSX Diablos PC16000C8 ( micron GTR) and the 2 out of 3 6gb OCZ Blades PC16000C7 (Hypers)