I am running Windows 7 64bit - quad core processor with 2 ATI 3870 video cards in a crossfire configuration. Immeadiately when entering the game the temp of my second card shot to 94 degrees celcius and nearly melted my computer. I then updated video card drivers and tried again same thing. I disabled crossfire in the Catalyst Control Center and am able to play without destroying my computer. Hope this helps others.