Hey everyone, Not sure this is in the right section, if it isn't can a mod/admin move it please. I am trying to OC my 4850 so it has a little more go in it, and I was wondering if I could get some info. If a 4850 and a 4870 use exactly the same GPU, why can the core speed not be raised to 4870 standards? Is it the PWM's? (Obviously you can't raise the ram to the same speed as it's only DDR3, but in theory the GPU core should raise to the same speed that a 4870 can handle.) I have a custom cooler on my GPU, and at stock speeds it only hits 49 degrees when under full load, so I should have plenty of OC room. Problem is I can only get about 12 MHz out of it before it becomes unstable. I think it may be a lack of power, is there a tool about that allows tweaking of the GPU voltages? Any general advice (Apart for take it easy, which is obvious. ^^) about OC'ing a GFX card would also be appreciated.