When in game, I could be driving any car on any track doing anything and my computer will lock up. Visuals stop, sound keeps repeating itself and only way to fix it is by rebooting. Now your all gonna suggest overheating, bad ram, and everything that Ive already tried. Specs: Intel Q9450 2.66ghz GTX 260 nForce 790i FTW Patriot xTreme 2x2 1333mhz ram 1000HWX Corsair PSU Now, earlier today I played the game without a issue for about 3 hours. I did make a change, I turned AAx4 on. I just turned it off again. I also have the performance thing off in the game. Now it did lock up before putting the AA on twice. I then went looking for solutions and found that performance thing that acts like VSYNC and I turned that off.