CPU AND MOTHERBOARD isn't over heating but pc keeps turning off

[Justin_26]

I've been playing a couple low demand games such as league of legends and team fortress 2 however when I switch to something like the Rainbow Six Siege beta within 5 to 10 minutes my entire system is shut off. Is it my gpu over heating?? Maybe my power supply is faulty?? Any comments are appreciated!! Thanks

 

[DonkeyOatie]

And what would all of the components of your system be?