Last night my computer restarted with no warning while I was browsing the internet. My temperatures were all fine and I haven't installed any new components except for a new GPU a month and a half ago. I then, thirty minutes later, found it to be off when I had left it on. It wouldn't respond to me pressing the power button and I then realized the power lights on the front of the case were lit, and the power supply fan was still spinning. The motherboard's green power led was lit. However, my case fan and leds were not getting power. I could flip the switch on the psu to turn it off, but pressing the power button returned it to the aforementioned state. This morning, I unplugged everything to begin troubleshooting it and when I had only the monitor and keyboard plugged in, it turned on when I pressed the button and functioned normally for about ten minutes when it then 'lost power'. Normally I would assume this to be a psu issue, however I noticed the cpu led was lit up red and everything else was as I described before with three monitor receiving no signal. Frankly, I just wanted a second opinion before I get into trying to determine what's wrong, so anything you may have to say is appreciated. My apologies if the formatting of this isn't exactly all that great, I'm posting from mobile.