About a week ago my pc started shutting down while playing World of Warcraft. Here is what I have done so far. I ran a stress test on my CPU and GPU. CPU passed test with no shutdowns, Stress tested the GPU and my pc would turn off. I tried this about 3 times and same results. After three test it wouldn't turn back on for about 30 minutes. So I am assuming overheating GPU. Done a total wipe and reinstalled windows 10. Re downloaded World of Warcraft. Updated all drivers from Dell. Re applied thermal paste to both CPU and GPU. It lasted a little longer after all that. Maybe an hour but now it started shutting off much faster. I can stress the CPU all day and no shutdowns. As soon as I start stress test on GPU within 5 seconds it shuts off. I went on device manager and disabled my Nvidia 880M graphic card thinking this would help. So I was looking on facebook about 20 minutes then shut off. This was running off my small intel secondary card. I turned it back on and ran a stress test on the little card a couple times and all was fine. Finally my question is, if my big card is disabled and I know it's bad could it still cause my pc to shut off ? I already ordered a new graphic card but won't get it till next week. But when I get it will I still have a problem? If so maybe a bad motherboard?