I have an FX-6300 air cooled by 212 Evo. The cpu is currently set at 4,8ghz. It runs reliably all software applications I use without crashes. In terms of torture testing, on AMD's Overdrive, it runs for about 7 minutes before some computational error ends the test, but not blue screen. In my opinion that is just fine and I will make further attempts at higher speeds. In terms of temperatures, I have seen 70 degC on many occasions, which is about 36degC hotter that the MB itself.