I can say (from my own experience) over clocking my FX-6300 did lower my benchmark scores, however my GPU is not so great and what I have been told is over clocking the CPU wouldn't help over all due to the GPU, that said I can say that the over clock DID lower my benchmark score, as well if you do go with the Cooler master hyper 212 Evo, could you please post new temperature readings I am curious to see if it was only MY PC that showed strange temperature settings with this cooler, I have seen online (YouTube) video showing the same issue (temps around 4-6°C on idle) that is the only reason I swapped back to the stock cooler, it worries me the readings seem so far out, and my thoughts would be if its so far off range, would the CPU just fry because the sensors are wrong and that would cause the fans to not throttle when needed