Originally Posted by Khalam
as Juano said, especially graphic test 4 in 3d11, if it passes that it will pass the whole 3dmark, heaven on extreme usually needs +15-20mV then 3dmark 11 to get stable
Indeed, I usually have to back down my clocks 10MHz or so in order to pass Unigine Heaven; no more room for voltage increases on my end without a hard mod.
It sounds like you need to keep track of temps, as K mentioned in an earlier post, and to up the voltage if your temps are fine.
If your scores drop once you go past a certain OC, it's probably because your card downclocked due to heat or voltage issues.