Computer stuck in reboot loop

[hutchx]

So I have had my computer for a few years. It's been good until recently. I had to replace ram but its been good for a month after that. Last night I went to turn on my computer and it came on for about 5 seconds then shut off and now it gets stuck in the reboot loop. I tried re-seating my ram, gpu, taking out the cmos battery. None of that worked. I just tried turning on my pc without my gpu in and it stayed running. I put my gpu back in and it shut off after 5 seconds again.

So my question is what do you guys think the issue is? Is my PSU dead? Is my gpu dead? or is my mobo failing?

My pc specs

OS: Win 10
CPU: i7-5820K
Mobo: x99 SLI PLUS
Ram: hyperx DDR4 8x2 2666mhz
GPU: GTX 1080
PSU: Evga 600w

[Applefreak]

Check all the cables, power button switch as well, maybe something came loose. Is it stuck at post and shuts off right after or does windows partially load? If it's stuck at post it means there is something wrong with the hardware.

[all things hardware]

I would blame the psu first, if possible try to test that in another system or swap it out with another psu if you have one on hand. If you trust yourself to next i'd take out the cpu and look for any bent pins and such. Laos look for thermal paste in the pins, that happens sometimes and can be fixed with 99% alcohol.