About 3 months ago, I replaced my old mobo with an Asus A7N8X. Since then, I've been having trouble running games. I've installed 3 games; EVE, Need for Speed Underground 2, and Call of Duty. I haven't checked for EVE, but for the other two, I meet or exceed the recommended specs. My graphics card is a Geforce4 Ti 4200. The problem I'm having is that the games all run very smoothly with no chugging or anything, but not forever. Usually after about 10 minutes (less with Need for Speed) the game will either completly freeze up my computer, requiring a reboot, or will crash my system altogether. What I don't understand is that if my computer can't handle the game, why does it run it incredibly smoothly for 10 minutes then all of a sudden, it can't handle it? I was able to fix the problem with Need for Speed by setting all the graphics to the absolute minimum, but that didn't solve the problem with the otehr two. Something else that struck me as odd is that I never had any problems playing games prior to the mobo switch, I had lots of games, like Planetside, Medal of Honour, Battlefeild 1942, and Rainbow Six 3. I also had COD installed prior to the switch, and I never had any trouble with it while it was set on the default display settings, but now it freezes. Anyone have any tips for me? I should also mention that Warcraft 3 and Civilization 3 run with no problems right now.