I recently purchased an Nvidia 9600gt. It is great except when I open 2 or more WoW windows I start getting video artifacts, usually in only one window. All other games run fine with no artifacts. GPU temp is at 38C which is well within the limit so I'm not sure what the issue is. I'm debating whether to exchange the card for a new one, but I've had problems with WoW and Nvidia before so perhaps WoW just doesn't like Nvidia. Any ideas?