This problem only started happening since yesterday after installing Natural Selection 2 the day before. Game will be running normally, temperatures are all under 67 degrees celsius, then my screen will flicker black for a second, the game will pop back up, but the FPS stays around 15-20fps and won't recover. I looked at precisions logs and it shows every monitor for the card dropping to 0, ALMOST as if the card is just like..disconnecting itself from the computer. At first it only did it on NS2, but now it's doing it on every game I try.
I've had this happen on another card before, but it always gave me the "this driver has stopped yada yada yada" error when it happened, this one gives me nothing.
Huh, turns out it's a problem with the newest set of Nvidia drivers, did some digging today and found quite a few people are having similar issues. Reverted back to the last drivers and everything is normal.