That's odd. While the last time I played the game was over a year ago on one GTX 260, it wasn't very system heavy... My GTX 480 at stock clocks didn't run too hot with an 80% fan. During the EVGA OC Scanner (runs hotter than MSI Kombustor), max load temp was 82 degrees Celsius. The air coming out of the back is never too hot, but I have an external VGA air duct covering the expansion slots, and a 120mm fan exhausting air. Since you had a crash, I recommend running LinX for at least 20 passes (I do 30), and then running MSI Kombustor for an hour, with full MSAA and all the nice features enabled.