While that's not an overheat issue, you are running too hot. Do you dust your fans regularly, and vent out to an open area?
I dust it out from time to time, although I haven't gotten in and around the graphics card lately. I've been meaning to pick up a can of compressed air and get that cleaned out. The wires and cables in my case are also kind of a mess, so I figure that airflow is a problem too.
Yeah, I'd definitely get that taken care of ASAP. That's dangerously hot.