1080 Ti, 4K 50 inch. was working all the way to level 50. Now it crashes fast. Its HOT in my PC box, but I have 8 inch top fans and all kinds of fans and the fan at 100% on the GPU. Its 66C and hot to the touch. Nothing else crashes my PC. IV posted my system info before and it was the pigtail power supply splitter I fixed that and now this is a general question what makes a GPU crash at what temps? is 66c hot?