I bought a new GPU a few months back and I am having a few problems with it. Ever since I installed it, my computer will run fine for a while and then the screen will go black but not turn off (my PC doesn't turn off). I have tried to recover it but everything I've tried doesn't work. I have been monitoring the temperature of my PC when I play a game and the Motherboard and CPU temps get to around 70-80 degrees Celsius, while my GPU only gets to around 50.