Ive probably read dozens of posts and threads regarding similar issues but i cant find the answer - and its driving me insane. I bought a new pc about a year ago: -3.0 core 2 duo (Intel) -2gb ddr 800mhz (not OC) -a good motherboard (i think? lol. its new too) -nVidia GeForce 9800GT 1GB (which i believe to be the core problem of this) -550W PSU While playing games, the computer crashes, freezes or something like that, (the screen is like refreshing itself, but the image is the same - then the sound fails, and eventually it goes black) and the only way out of it is restarting. i get strange issues on different games (sometimes i get nice green pixels on some of the objects in shooters or X3TC(game)) but the bottom line is i cant play anything at all. As i said, ive read about issues like that countless times and here is what ive done so far: -monitoring: -i checked the temperature of the core, gpu and both seem stable (gpu =48C, core =31C both on min load - on max gpu <70C, core <40C) -i changed the gpu fan properties via RivaTuner -i scaned the ram with memtest86+ (and it showed 0 errors!) -tried to find a crashing point: its random: from 75 degrees C to 60 degrees.. -cleaning: i obviously cleaned it out of dust (took 4 hours!) -connections: -all connections were checked, i get no problems or warnings from bios (no beeps etc..) Im near desperate, and i already contacted the supplier. any other suggestion before i throw that card into the face of the shop that sold it to me? p.s. thanks to anyone who replies.. im very desperate..