Yeah, 4.2 ghz will be plenty for gaming with that GPU. You're good. If you keep this build around for long enough to throw in some crazy future GPU (7970 ftw), you can go higher.
Who convinced you to get a PSU that powerful? Are you planning for SLI in the future?
Sounds good. I kept the settings and then ran Prim95 test for a while, not long enough to do much, but cores went up to between 56-59C so I think I'm good.
Yeah, I plan to SLI in the future. It's also my very first build so I'm sure I made some mistakes in some areas like getting too beefy of a PSU, but I was told that I might want one like that if I was planning to SLI at some point in the future, which I am.
Anyway, thanks for the help. It put my mind at ease.