I recently put together a new pc and ive got the Nvidia 8800GT card running with my new system, its seems to be stable and running fine, plus theres no errors about the device not working properly etc. So anyway i go to play a game and when ever i start playing about 5/10minutes into it the monitor goes black and theres no display as well as the sound loops. At first i thought my card was overheating so i download RealTemp to monitor my cpu and gpu temps, so again i tried to play a game and was playing Left4Dead on full graphics until again i was stopped by the same problem, the monitor went black and sound starting looping. Whilst i was playing i was looknig a temp checker and it crashed with my cpu only on about 40c and my gpu was only on 59c :/ im stumped as to what the problem is, ive updated drivers installing beta drivers too and still noting works, according to windows all my drivers are up-to-date and working correctly. Please help i have no idea what is causing this anymore =( My Specs are: Intel Core2 Quad Q9650@3.0GHz 3.0Gb of Kingston RAM Nvidia 8800GT Alpha Dog Edition XFX Asus p5q Deluxe MB Corsair TX650Watt PSU Any suggestion are much appretiated

Enter the BIOS & disable the onboard sound. Boot into Windows & uninstall the sound drivers. Reboot & try your game. If it doesn't lock up, you found your problem. Run a cleaning program such as CCleaner-slim or Glary Utilities slim, reboot, re-enable the onboard sound & try a different driver.

Nope just tried it still crashes in-game =( im convinced its my graphics card. it has all the results of an overheat but the temps are too low to overheat :( Really strange, its not my RAM because ive used that in other computers and i forgot to mention earlier i tested my old graphics card and old ATI x1300 and that was working fine appart from the lagg due to stressing it ^^ but other than that there were no crashes at all. Does this basically mean my Nvidia card is faulty or is there something im missing? Btw thanks for taking the time to help me :P Much appretiated

Hmmmm. Try an older nVidia driver.

yeah im using and older one now and still the problem exists =( i have absolutely no idea whats causing this problem anymore ive tried everything

Regardless of what the temp registers are saying it is a classic symptom overheat of something, somewhere. There are more temps that are critical other than CPU or GPU. Try another set of temp registers, and see if you can get a reading on the RAM. I also suggest a mobo chip temp check. Several years ago I had a problem similar to yours and actually having placed a termometer on the RAM found it scorching hot. I installed a RAM fan and solved the problem.

ive checked all temps all seem fine, mb is around 25c, hdd 32, cpu 22, gpu 54, and RAM i cant measure but whenever i shut down it feels only warm, not too hot and certainly not enough to overheat it