Power Supply or Motherboard?

[daniceto]

I just built my first computer, it was running fine until recently I ran into some issues. Yesterday I was working on my computer and it was fine, even played some games. Today I tried to turn it on again and there was no response, I waited, then it turned on for a couple of minutes then it died again. It kept repeating this process, my question is, is this problem being caused by the power supply or the motherboard?
System:
Z77A-G45
XFX R7970
Corsair RX650 V2
Core i5 3750k

 

[o1die]

Only you can know for sure by swapping out components or disconnecting devices one by one until the pc stops shutting down. I always keep a spare ps for testing. I would start there. You can find some used starting at $10 on craigslist. Use the onboard video for testing, then try your video card once the system is running smoothly.

 

[o1die]

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