Please tell me this is a driver thing. Glitches on the desktop on my lviing-room PC, starting right after the GeForce Quadro Graphics Driver update:

the card isn't new but it's never shown anything like this before. temperatures look normal. I've tried a different cable and the artifacts are the same. I'd like to know what to test before I convince myself it's dead. I also do some photo work on the living-room PC, so I really need to know whether I can trust what I see on screen right now.