Have you monitored GPU temperature via CCC? Maybe it's overheating and all you need is to: - reseat the cooler and/or RAM/VRM heatsinks - strap an inaudible low rpm fan to the card. I did measure tempeature Date , GPU Core Clock [MHz] , GPU Memory Clock [MHz] , GPU Temperature [°C] , Fan Speed (%) ...

I've got Power Color HD7770 http://www.powercolor.com/de/show_img.asp?id=413&file=image_b_s_2.jpg using with monitor resolution 2560x1440; problem is that when DirectShow or Flash is active then I see some black squares artifacts; I tried many drivers&settings and still no luck. I don't do gaming bu...