Question While playing some games my pc freezes and monitor turns off

[AlveHossain]

While playing some games like Assassins Creed Rogue/Black Flag, Fallout 4 my pc freezes and my monitor turns black and the monitor's indicator blinks and freezing sound comes from my speakers. I have to shut down my pc with the button then start again in order to work again.
Horizon zero dawn/A plague tale innocence/Assassins creed origins/Assassins Screed Syndicate/Batman Arkham Knight etc games doesn't show any problem like those.
Only happening to some games.
Those games are tested on one of my friend's pc and works fine.
Why is this problem happening?
My config:
Amd ryzen 3 3200g
ASRock A320M HDV 4.0 motherboard
Gskill ripjaws 8gb 2400mhz+Gskill Flare X 8gb 2400mhz ram(I've tried with single ram and the problem still happens)
My PSU came with the case so no branded psu here. It says peak power 450w

 

[GarrettL]

It's either a thermal issue or a psu issue.

Try running FurMark for the gpu and the program will show the gpu max temp and CineBench20 for the cpu and monitor with Ryzen Master. If these temps are fine then likely the psu.

 

[AlveHossain]

It's either a thermal issue or a psu issue.

Try running FurMark for the gpu and the program will show the gpu max temp and CineBench20 for the cpu and monitor with Ryzen Master. If these temps are fine then likely the psu.

I dont have a gpu.
Im using 3200g apu which comes with the vega 8 integrated graphics.
And whenever it freezes and monitor shuts off the temps never go higher than 70 degree on my pc.
I used msi afterburner while gaming.

 

[maxamillionfeettall]

My PSU came with the case so no branded psu here. It says peak power 450w

Replace the psu. It may or may not solve the problem, regardless, a fire hazard psu shouldn't be used. Get a new one.

 

[AlveHossain]

Replace the psu. It may or may not solve the problem, regardless, a fire hazard psu shouldn't be used. Get a new one.

Okay

 

[maxamillionfeettall]

Okay

get one that's half decent, cross check from here.