Is my power supply unit dying?

Vanthex

Prominent
Apr 9, 2017
2
0
510
Hi guys,
I just built my pc a few days ago. Today when I was playing some games, my PC would just shut down without warning randomly and restart. The timeframe between each restart also gets shorter sometimes , from few minutes, to even 30 seconds. One thing I noticed is that none of my components are overheating and that my power supply will just stop working (causing everything else in the PC to stop).
I've tried reconnecting all external and internal cables and restarting my pc manually for a few times. Reseated my gpu too.
My psu is Evga supernova nex 650w gold brand new which I've bought a few weeks ago from Amazon. I'm surprised that I ran into these kind of problems this soon. I suspect that it might be faulty or dying.
My specs:
i7 6700 with stock cooler
Msi b150 PC mate mobo
Evga supernova nex 650w gold
Msi radeon rx 480
Mushkin essentials 1x8GB RAm
Corsair 250 gb ssd

That's all I can remember

Any help is appreciated!