Scratch the above. I'm going to keep this board 4ghz, DDR3-2000 8-9-8-21 turbo should be good enough for most people..

I'm convinced the reason I can't break 4ghz is due to a thermal wall. My chip is hitting 81c load temps (1.31v), which is pretty damn high. I think I'm going to order another fan to put on my Megahalems to reduce the temps a bit, then I might try for 4.2ghz again..