Pez, Ive had driver issues with nvidia since the 178.xx drivers. They seem to work jsut fine except for ceratin games artifact like crazy for no reason. Ive tried all the 180.xx drivers, didnt help. I even have 181.xx loaded up. Still the same damn issue. For my cards I actually went with a much older driver. For yours try loading up the 177.79
driver for xp, see if that changes anything. I noticed when I went with the older drivers, my framerates dropped slightly, in some games worse than others, but it just looked better. Ill take a slight frame rate hit for that. Not to mention it took care of all the artifacting I was getting in games, so I know it was a driver issue causing me my headache.