Yesterday I put in a new cooler on my card, and when I installed it my PC would boot up with all the fans running, then shut off, then turn back on again, then shut off and it keeps doing that. I took put the gpu and it still did this, then realized the comp still did this. So I took off the 8 pin and it runs fine withput shutting off. Why is my 8-pin doing this? Everything was running fine yesterday.. please any help would be great.