When I'm gaming, my video card will just crash at random, usually anywhere from 1-30 minutes after starting up a game. Sometimes it won't crash at all, but most of the time it does. The screen will freeze, the audio will stutter, then either the screen goes a solid color and the sound buzzes, or the monitor reverts to "looking for input", as though it doesn't realize my computer is still plugged in. Sometimes in the latter case, an alt+tab can minimize the game and I can kill it from the task manager, but more often than not it freezes my computer and I have to reset.
This happens to me fairly regularly in most of the games I play (TF2, L4D, L4D2, Portal, Indigo Prophecy, Mirror's Edge), and I really don't know if it's an issue of the card overheating, or having trouble with Windows 7, or having trouble with Steam, or any of a number of other things it could be. Does anyone have any suggestions on what to try, because I don't even know where to begin troubleshooting. Thanks!