I previously had an A8 6600K@4.6Ghz. I just last week got a nice budget H81 board with an i5 4570 and the step up in gaming has been very nice with the few titles on the market that are heavily single threaded. My board is actually capable of overclocking on unlocked chips and I am seriously considering returning my 4570 tomorrow and getting the 4670K for a difference of $40 CAD. I know I cant push it but what is the average voltage needed for a 4-4.2GHz overclock on the 4670K and will I notice much difference from the 3.4Ghz 4570? This is purely for gaming btw Oblivion, Starcraft 2, GTA 4, Wow and all the other titles which benefit from stronger single thread/IPC/CPU performance.