When running GPU heavy applications such as video games (everything else works just fine), my computer will appear to shut off. I say "appear to" because while the display and the fans abruptly shut off, the light on the motherboard is still on and the lights on the front of the case are still on, but the buttons will not respond.
In order to get it to start again I have to unplug the power supply, wait until the power drains, and then firmly plug it back in again. If I don't jam the plug back into the power supply firmly enough, pressing the power button will only start it up for a few seconds before it'll shut down again.
I've had a short history with heating problems with this PC. Hot room in the heat of summer, mostly, but I've managed to keep it under control for the most part by adding a strategically placed fan or two.
Mostly, I'm suspecting that my problem is the power supply (I have a Corsair Enthusiast TX 750 Watt coming in the mail today, will try it out as soon as I get it), but I worry that struggling with heating problems all that time has fried something important and expensive, particularly the CPU and motherboard.
So far, I've reseated pretty much everything inside the case, switched out the video card for another Radeon HD 7870 I had lying around (no change as far as I can tell), blew out any dust that was in there and made sure the radiator was clean. I doubt that it's a heating issue now because it shuts off as soon as it loads up the 3D models and environments, sometimes even just before.
Hopefully, the new PSU will fix the issue, but just in case it doesn't, I wouldn't mind hearing what you guys think might be the problem. I'll update you guys once I test it out.
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