Haha, funny to see this one back- i thought people would care more when i found this. If I lived in an Australian summer, I dont think switching speed step off and over clocking would be on the cards without proper water cooling - and traditionally of course the highest overclocks cannot be reached with a cpu teetering up and down all the time. The very highest overclocks are also of course where your heat moves up exponentially.
I do have a mix at the moment eating about 50% of my cpu on 1024 samples, and my chip is running at 4ghz currently which is a bit lower than i used to have it. Thats inclusive of a psuedo master chain as well though including nebula and fgx. Im tempted to put it in the garage with an ultra long cabling system going up to my room. Its -5C out there at the moment and I think I could probably get towards 4.5ghz-5ghz lol