I have an 8800GTS, latest drivers from Nvidia, and 2 monitors.
I've recently been playing Dragon Age 2, but 5 - 10 minutes, the graphics utterly die. The game locks up, Numlock won't go on & off, the sound becomes something reminiscent of dial up tones, and the graphics change. The colours sometimes invert then flick back, and the secondary screen 'tears', with a line of less broken picture flickering down it.
Sometimes this also causes the monitors to turn off. Occasionally the sound will resurrect itself, but not always.
I've watched the temperatures as the game plays, and the graphics never gets above 90C.
It's only ever happened in Dragon Age 2, BUT after playing DA2, I tried to install an Nvidia monitoring tool. As soon as I clicked on this tool, the machine bluescreened, and when coming back on it didn't the tool installed any more.
Finally, sometimes the BIOS screen and Windows boot manager will also have screwed up graphics, if I reboot after the machine dying.
I've done a memchk, and tried some tool that checks the memory in the graphics card too.
Also, both screen's graphics mess up.
What's going on, can it be fixed & do I need a new graphics card?
After a crash, the screen looks similar to the monitor in here, but the picture 'underneath' is still obviously dragon age.
The core temp was at 75 this time when it died, which isn't very hot. But it did take longer to fail after being off for 10 mins, which points to overheating.
It now also dies in TF2, and when the crash happens, sometimes the secondary monitor just mirrors the first.