I had an evga 6600 gt just go out on me.
PC restarted and had artifacts all over my screen that wouldn't go away.
Called evga and they were cool, they said they think the memory is defective on the card and are sending me a new one. Only bad thing is it'll be 2 weeks until I can game again, and I'm pretty nervous that I'll be unlucky again.....
Card worked perfect for a week, great performance when it worked.
If you buy it from newegg then you have 90 days to trade it back in to them for a new one if that is what you gotta do....