Built my first pc, randomly restarts with no BSOD

[Commanderkev]

Hey guys, I built my first pc over the weekend and it was great. I was very excited when it turned on and booted up properly but it would reset itself every so often. First every few hours and then every few minutes. I have tested it for overheating and it looks fine. I have tried each of my RAM individually and I tried a graphics stress test all on the advise of friends but no luck. Any suggestions on why it keeps resetting? It boots up windows, and logs me in, then after a while it just resets. No blue screen or anything.*Strangely, I found that running Team Fortress 2 delays the restarts for a long time. Very strange.

Thanks!

Here's the build, I have a different motherboard but I'm writhing from my phone, sorry.
Intel Core i5-3570K, Sapphire Radeon HD 7950, NZXT Source 210 (Black) - System Build - PCPartPicker

 

[Faladu]

I would put it at 95% chance it's PSU issue. That's a cheapo corsair, if it's bad I'd return it and upgrade to a better one, visit here: Cougar RX 500W Review <---link to jonnyguru.com

5% motherboard.

RAM would beep at you at boot or BSOD you.

CPU only thing would be if you forgot to put thermal paste between it and it's heatsink or the fan is not plugged in.

I had put a much longer message in and it got cleared by accident, so that's my redo above, too tired to rehash.

Check event viewer and see if it gives any clues as well.

 

[Commanderkev]

Thanks, I will try a psu with at least 650w.