Re: What are you guys using to overclock the gtx280 ?
I just tried Furmark a couple of days ago at the recommendation of Lfctony. It is by far the best stability tester. Nothing heats up a card like Furmark. Furmark makes your card run way hotter than rthdribl or even Crysis. If you want to test the worst case scenario use Furmark.
As for overclocking the 280 GTX, I would be careful with overclocking it, the card already runs incredibly hot, when you overclock it, it runs even hotter.