Question Random shutdown and reboot

[Thom@Sc@t]

My computer automatically shutdown when I play games. It then restarts again, and then turn off immediately just after BIOS. This cycle continues for 7 -8 times till I pull the plug. I have even replace my psu but it doesn't solve.
My specs
i3 4150 3.5Ghz
12 GB DDR3 1600Mhz ram
Gtx 1060 6g
450W cooler master MWE psu

If anyone has experience this issue and fixed it, then pls help

 

[rgd1101]

check cpu/gpu temp?

 

[Thom@Sc@t]

Every thing is fine. Temperature remains normal. I have even reinstalled Nvidia drivers. But it still shutdown randomly and then restarts again