My GTX 670 was having problems last night, had a few crashes when loading a certain area in Fallout 4. The GPU was crashing, not Fallout, because it kept saying the display adapter stopped responding and has recovered. Because of the crashing I just shutdown my computer and went to sleep. Today I tried to start it and the mobo and fans etc came on but wouldn't POST. I took the GPU out and it did boot. Then I put it back in and it still booted. But now loading games it can run fine like GTA V it rockets up t 100°C and the GPU starts throttling to handle the temps. I'm not sure whats going on but would like some help because this is beyond my knowledge. Im going to try reinstalling the driver after posting this.