You should not need to disable any power saving features. Why would you want to anyways?
Unless there is some kind of program your running that your 2600K can't keep up (highly doubtful) or maybe your running 2 or 3 GTX570's (your not), there is no point in overclocking your processor at all except to make your e-peen bigger.
I don't think your e-peen is going to impress anybody here.