I have fx8320 and hyper 212 cooler. I was able to overclock using bios settings my cpu to 4.5Ghz. I tried giving it more ummp, 4.6Ghz but it crashed. Now. Im back to 4.4Ghz, i think its stable. Sometimes I put it back to 4.5Ghz for the heck of it but honestly 4.4-4.5ghz? no such effect. And honestly even from stock speed of 3.5 (3.7?)Ghz to 4.4/4.5Ghz I did not see any improvement in my games. Its still the same FPS counter man! same. no 1-2-3 FPS improvement whatsover. Yeah if you load GPU_z or whatever tools to check cpu clock, its says 4.4Ghz this or 4.5Ghz that but real world effect as in you can feel the overclock? NO BIG NO. I honestly think this overclock is just a marketing ploy. A PLACEBO Effect if you ask me. The only benefit of this master cooler hyper evo is that my CPU is so silent now when i play. I remember the stock fan from AMD, what a loud fan like roaring like a jet engine during my gaming.