I have these artifacts for some time now, but only working on desktop, not in games. But it shows with 3D clocks too when running, for example, ati tool's 3D renderer. It shows only when switching applications or when some action is, like right clicking menu. It happens totally random. For one day It would run ok, but other day it shows artifacts, then few hours later it's good again. I have tried reinstalling drivers, even OS, reseating and it all helps for some time like few months maybe, and then it starts again with same driver that worked well before. Could be VRAM dieing? I have never OC'ed VRAM, I have manually set cooler to maintain GPU temps about 45°c, except games about 70°c. It's nothing urgent, I just want to know your opinion of what/why could it be, because it's annoying.