My pc Shuts down when playing some games

Michael983

Prominent
May 6, 2017
4
0
510
Hey guys!

I recently purchased a new GPU and everything runs fine. My games get 60+ fps and doesn't lag a single bit. But on other games it shuts down, games like: Need for speed 2016 and Rainbow six siege.

PC Specs:

Intel Core i7 4790K
MSI GTX 760 2GB
8Gb Ram
650W power supply

Any help would be appreciated!
 

Michael983

Prominent
May 6, 2017
4
0
510
I Cleaned m,y entire pc out from top to bottom and everything went fine for like 5/6 days and then it started again.. I dont know if its actually my psu then or what
 

Michael983

Prominent
May 6, 2017
4
0
510
PSU: Coolermaster G650M
And an Asus motherboard i dont know which one
and i dont know the RAM manufacturer, but im running 2x 4Gb

It doesn't shut down as much anymore but its Micro stuttering in games now