Yeah the BFG 280 GTX that I returned was the same way, when I took it to the store for them to test, they just hooked up a motherboard on a desk, with no case so it was entirely open air in an airconditioned store and it still hit 105 degrees in a minute.
The weird thing is the BFG never really artificated, the problem was that it would throttle and shut itself off.
My new EVGA I have the case closed and my fan only goes to 80% (instead of the roaring 100% of my BFG) in furmark and the temperature is still only 85 degrees.
Originally Posted by visualguy
I just increased the speed of my case fans from 2000 RPM to 3000 RPM, and that didn't have much of an effect on my GTX 280. It still overheats with FurMark running at 2560x1600.