for pity sake, why, why do you have an OC cpu when you want gaming? you wont get anything out of it, games are not CPU intense... do you realy want to do streaming or content creation, or are you clueless... if you just want to game, then get a good i5 or a cheapest i7, period... and get the bestest graphics and OC the shit out of it... do not OC the cpu...
as stated, you will play it on medium, high (mostly medium in very recent upcoming games)...
PS you didnt say how many GB ram you have... but for gaming 2 sticks of 4 GB is good and enough.