Honestly, I should have said this in the other thread I was in on, but you won't gain many FPS yet from OC'ing a 2500K (well, if you're gaming at a super low res, you might). With a 2500K, especially at anything over 4.5Ghz, the GPU will be the most limiting factor, for now, as the GPU will have a hard time keeping up, unless it's an absolute top end GPU. In the future, it'll probably help a bit more, but for now, it's not really worth it.
Way more FPS to be gained from a GPU OC.