You should be very very worried, use a different software like realtemp to find out if it says the same and take your graphics card out of your pc and dust it off!!
^ Maybe he's using the 8500 for PhysX or to drive a third display.
@ outeclan: Try the old 'case fan and cable tie' trick, it's clumsy but works brilliantly for low end cards like the 8500. Or you could search E-bay for a replacement fan/dead card with a working cooler/fan and swap them over.
I am using the 8500 sometimes for a third display as 17 seconds pointed out. My main card is the 760, however I enjoy frying bacon on the 8500 sometimes