It's not really meant for OC'ing, at least not the hotter AMD CPU's I imagine. Keep in mind this chip runs 4.1-4.4GHZ under load. Not sure about the Intel chips though. The PRO is the step up that is much better equipped, I think the PRO has a 40mm thick radiator vs. the Performer's 25mm. I do like the dual PWM fans as it does run really quiet. Only problem is max is 2000 rpm's on those. Live and learn I guess.
PS: Intelburntest was showing up to 80C running the standard test. HWmonitor was showing wild temp fluctuations (around 40c idle) so I don't think it was reading it right but the burn in test definately showed throttling. Funny cuz the Biostart Hi-FI mobo showed idle at 27C consistently in the bios???? had the mobo set to shut down at 75C cpu temp so not sure which is correct...