My old Radeon 4850 gets from about 70 degrees to 100 - 110... Celsius.
I did take it out, cleaned it, took of its cooler, applied new thermal paste on the chip and everything, just a weak ago. When i first noticed this very big temp spike.
Even added another case ventilator to blow out the hot air.
Intel i-3, 4 gigs of Ram, and win 7 64 bit. And all the latest drivers, of course.
Would be nice if the Original Sin would not burn my old faithful ...