Nvidia Forceware drivers, anything over 91.47 if I apply coolbits reg entry completely shafts the pc. Hangs opening display properties, goes abit, hangs, goes abit, hangs BSOD... Games are effected with the 91.47 they seem to run abit juddery. Drivers over 91.47 run better but sometimes it seems as if one card doesnt work..... COV for example, outside it runs circa 20fps, get in a mission 60fps pretty much all day, back outside, 20fps max! its *****. Why is this happening? Trouble is I have a dodgy 7800GTX OC it doesnt like anything over 1.70ghz mem clock (suposed to be 1.75ghz) so i need Coolbits to downclock.