A few months ago, I placed a new graphic card (msi R7770 afterburner) In my Pc. Since then, my Pc generally <<edited for inappropriate language>>up. The CPU was always used for >50% (randomly without starting up a program)(I looked it up in the task manager) and then the real problems startet. My pc turned off. Randomly. My i7 overheated so fast that my cooling system, didn't make it to start cooling. Now when I am able to turn on my computer, it runs for about 10 min. Except, I start a game which is a bit more 'challenging'. Then it immediatly shuts down. After it shut down, my Pc tries to start up again and he ends up like this; starting->beep->shuts down. It's not a normal shut down. It's like he suddenly lost his whole electricity. I'm not sure if the problem lies in the power source, the graphic card, the overheating of the i7 or the motherboard. Please help me.