stoneys-nutz

Hello fieseler,
What are you using to monitor the temps ?.
Are all your fans working and clean ?. (both GPU and case). You may have to remove the card to clean it, check it has good airflow through the cooling fins. (heatsink).
What sort of temp has it run at in the past ?.
I had two BFG 8800 ultra's in sli, they ran very hot but i cant remember them going in to the 80C mark, about 75C/76C was about max for them, although they do run very hot these cards.
BFG will say that 80C is ok and that they have had them run at 90C in tests with no issues, i think the cut off is around 130C for 8800's, (WOW thats hot), unless you are getting graphics problems i would clean it out and keep an eye on it. You could play around with the air flow in your case and see if that helps, or put the fan speed up a bit, i dont think it hits 100% untill the temp reaches 90C, riva tuner is a good way to increase fan speed.
Hope this helps put your mind at rest, good luck.