PC Freezing while gaming

[JEBIN JOHN]

PC Specs:

i7 8700k

gtx 1060 6gb

motherboard gigabyte z370m d3h

Bios F14a

16gb ram

PSU corsair VS 650W

 

On regular browsing and documentation i don't feel any issues and when play games, Freezes and doesn't show any error and have to hard shut down, Freeze time depends on which game i play.

Did stress test on intel XTU PC temps

CPU 66

GPU 62

 

16gb ram (2* 8gb) in which i tried using 1 ram stick crash happens but stay for little longer.

 

Please help with the issue.

[JEBIN JOHN]

I also found that in my 24pin for PSU there's only 23 pin with cables so i don't know if that's the problem happening please help??