So I was just overclocking my gpu with msi afterburner and heaven benchmark and set the memory clock from 300 to 400. The screen had green squares all over it! Then I waited a bit and the screen repositioned itself a little off and so I just shut it down using the on/off button. Then when I turn it back on, it looks fine until I go to heaven benchmark. The app was playing at 5fps! I tried overclocking it and it seemed to not have a difference at all; still around 5fps. please help!