Hi there, I've been noticing flickering or a 'grey line' appearing when I play games on my XFX HD5770 1GB card. I tried to change the voltage from 0.950 to 1.2 via ATITrayTools and it seems to have decreased the effect. So now I want to change that in the BIOS. GPU-Z shot: I loaded my BIOS via RBE(using Winflash) and somewhere I read we have to change voltage through the "GPU Registers" but, for me it is greyed out: I also want to change my core and memory to a single value to disable PowerPlay "850/1200". So how do I do it? I tried changing all the clocks above to 850/1200 and voltage to 1.2 and flashed, but after restart, the display driver kept crashing so I reverted back.