Random PC shut downs

[NobsishWiz]

So I've gotten a new pc roughly a year ago but havent used it much since I haven't had internet connection. Now that I have started using it mor frequently it just has some random shutdowns (not restarts just shutdowns like I've pulled the cord out of the wall). Pretty sure it isn't overheating problem because I've checked my temperatures and they are all bellow 60°C almost all the time. One other thing to mention would be that it doesn't shut down when I'm doing simple operations (like skype) but rather when I'm playing videogames or watching videos in 1080p.

Config: Proc: AMD FX 6100 six core 3.3GHz
Graphics: ADM Radeon R7 250 OC version 2 gb DDR3
RAM: Adata 4 gb ddr3 x1
Motherboard: Asrock N68C-GS FX
PSU: MS Platinum 400W V2 ATX
HDD: WD Blue 1tb

 

[garyshows]

could be the psu isnt supplying enough power or is just cheap

this would be a better psu http://www.newegg.com/Product/Product.aspx?Item=N82E16817438053

 

[NobsishWiz]

could be the psu isnt supplying enough power or is just cheap

this would be a better psu http://www.newegg.com/Product/Product.aspx?Item=N82E16817438053

CPU Vcore = 1.344V
+3.3V = 3.408V
+5V = 5.112V
+12V = 11.877V
Is this fine?