My GPU was running fine on games until it was starting to slow. I checked the temperature on the GPU and it reached 101C (I did double check and it was on C). No problem, I just wait until I can afford an older GPU to hold off on until I have enough for a new computer. But then when I checked on the temp with GPU-Z, the temp went up to 140C and it's still rising while I was on Youtube. It froze a couple of times, so I reset my computer and checked the temp, and it was at 150C. What should I do? I cleaned it before, but it only got higher. Should I get another GPU, or go for a new computer? My GPU is a NVIDIA GeForce 9400 GT.