Alright I need some advice on this one. I was running Unreal Tournament 3 this evening and my video driver (nv4_disp.dll) stopped working for some reason unknown to me. Anyways, I had been playing the game for maybe 45min and everything was running smooth until everything went black and I was thrown onto a really ugly desktop with an error message. The message basically told me that the driver stopped (duh) and that I needed to reboot the machine. I've attached a pic of what my desktop looked like after the driver failed. I didn't get a blue screen (so no minidump) but I was prompted with a serious error pop up box when Windows restarted. Do you guys think this is just a faulty driver or could it be heat related? I did NOT have my VGA fans running at full speed so maybe all the power finally caught up with the cards? Here are my current specs: XFX 8600GT XXX - 2 in SLi ForceWare version 175.19 (WHQL) As you can see in the pic the CPU temps were fine and the "CHASSIS2" indicator is actually the speed of one of the GPU cooling fans. I can usually find a solution to my own display issues but this is one of the most hardcore problems yet! I hope someone will be able to help me out. Thanks in advance for any input!