PC stops working

[otello.hanara]

I have some problems with my pc. When I play some games(not all) my pc just freeze for like 1 sec, then black screen and after that I must cut the power or it won't do anything.
Those games are: Overwatch, Heroes of the storm, Tomb Raider(on steam).
My comp:
- ASRock a320m pro4
- Ryzen 5 1600x
- 8 gb ram dual-channel
- RX580 8gb special edition
- Thermaltake Litepower GEN2 650W

Temp: 70 C GPU
60 C CPU
~45-50 MotherBoard...

What can I do? I have 2 120mm fans to suck air in, and 1 120mm 1 92mm fan to blow air out.

 

[otello.hanara]

MERGED QUESTION
Question from otello.hanara : "PC stops working"

I have some problems with my pc. When I play some games(not all) my pc just freeze for like 1 sec, then black screen and after that I must cut the power or it won't do anything.
Those games are: Overwatch, Heroes of the storm, Tomb Raider(on steam).
My comp:
- ASRock a320m pro4
- Ryzen 5 1600x
- 8 gb ram dual-channel
- RX580 8gb special edition
- Thermaltake Litepower GEN2 650W

Temp: 70 C GPU
60 C CPU
~45-50 MotherBoard...

What can I do? I have 2 120mm fans to suck air in, and 1 120mm 1 92mm fan to blow air out.