Hello! I decided to OC my PowerColor 7970 Ref beyond the 1125 max of afterburner. So I unlocked it and set it all up. When I went to overclock it, I immediately set it back to 1125. Before I even got to running kombustor I had artifacts. not even like lines on the screen. It literally looked like there was a mini earthquake in my monitor. After more testing, I realized any change does it, even lowering the clock. This never happened before I unlocked it. Also there is coil whine which I never experienced before.