!Please turn on annotations and watch in Full Screen 1080p! GV-N560OC-1GI rendering bugs at factory settings in Battlefield Bad Company 2. Level: Heart of Darkness Graphics settings can be seen at the start of the video.
Otherwise, the card passes artifact testing (ATITool), can go on for hours in e.g Furmark, etc.
The problems in the video goes away as soon as I lower the clock/voltage to stock levels. (I guess raising the voltage might help it as well - I haven't tried, since I am not a big fan of shortening the lifetime to gain 10% more frames/sec.)