Has anybody ever heard of the stock Nvidia 5200 overheating in a dual 1.8 G5? It keeps crashing while playing games, any game for the most part, and the only thing I can feel is that the passive cooler on my GPU is very very hot to the touch. Almost too much so to touch. Only other thing I can figure is my Memory Controller Heatsink is running at 54.22C. Can anybody else with such a system run the Temperature Sensor 2.0 to see what everything is running?