i7 3770K's seem to have a good spot about 4.5-4.6G needing 1.25V. Once you go over that you can spike to needing over 1.4V pretty quick for stability and the temps skyrocket. I would say if you got it to 4.6G without issue, leave it there. You shouldn't have temps over 75C if you want it to run for a long period of time.
Thank you very much, my temps during normal/light use never goes above 50C, and during heavy gaming (such as BF4) it never goes past 65C.
Whenever my budget allows, I plan to get a Noctua NH-D14 cooler, and then later on a custom watercooling loop. But that's way down the line.
I am content with 4.6GHz, but since I am learning how to OC Ivy Bridge, I'd like to see just how far I can push it, even though I play to leave it at 4.6GHz once I do find out what the max is.
Would you recommend changing anything else other than Vcore to stabilize the OC?