Random computer crash while gaming

So I just bought the game watch dogs. I know I was realeased 2 years ago but I got it for 8 bucks. I started playing it but like 10 minutes in, both my monitors went black but I could still hear the sound for like 5 seconds the the sound also died. I've tried to fix this but later I gave up so I started playing gta 5 on pc that I bought a long time ago. And then it happened again like 30 minutes in. The thing is, I could play gta whitout any issues before the problem with watch dogs happened. I have a pretty good pc so I dont know what causes the trouble.
My pc hardware:
Graphics: NVIDIA GeForce GTX 970
RAM: 8,00 GB
OS: 64bit Windows 10 Home
CPU: Intel(R) Core(TM) i5-3350k CPU @ 3.10ghz
PSU: Cooler Master G650M 650W
 
Back