I got my QX9650 stable on the S2E with the OCZ DDR3-2000 running @1780 8-8-8-24, but my OCZ DDR3-1600 EB is a no go @ 1780 even with 2v vDIMM(rest of the settings same). I guess I would have to sell my EB sticks and get 1 more of the OCZ DDR3-2000 for 8GB.