Hi everyone, I am having a problem when playing games at the moment. In CS:S and TF2 the screen freezes for about 10 seconds then I am free for another couple of minutes. In BF3 I can play online for 5 minutes and then it crashes to the desktop. In May I upgraded my 4850 to a Asus 670 TOP, up until now everything has been running pretty smoothly. What I have tried: Checking temps - They dont seem too high Changing the 670 over with the 4850 and I still seem to get the same problem Changed PSU over, still see the same problem Used driver sweeper to remove all nvidia drivers and reinstalled. Tried using 306.23 same problem. I have updated the BIOS on the 670 Other than replacing the motherboard, is there anything else I can try? Thanks in advanced!!