Mini Black Box

4.6 ghz @ 1.216V seems like an unusually high overclock for such a low voltage on an 3570k, that sounds more plausible for sandy bridge 2500k. How did you achieve such a low overclock. I'm planning to get the same processor and Mobo, but assumed a 4.2-4.3 ghz overclock was the target for ivy, and if i went sandy 4.5-4.6 would be my top end.