I just purchased this http://www.newegg.com/Product/Product.aspx?Item=N82E16817121080 for my new build and while its not cheap, it's 80 plus platinum, can easily supply 650 watts even though it is only rated at 550, and has not one time had the fan turn on since I have had it up and running in...
Yea, I didn't try to use the BIOS at all to overclock on my GeneZ / 2500k. I read an article talking about how you won't get much more out of it by manually OCing so I just used AiSuite AutoOC and got 4.4Ghz as well and I am idling fine, temps haven't risen over 26c!
I just got my Gene-Z / 2500k setup and used the auto overclocking feature with AiSuite, I got 4.4Ghz, Vcore 1.296, temps have never got over 26c but I have also not ran Prime...Got a link?