GPU problems?

This is probably going to be a longer question.

So let's start from the beginning.

I assembled a new PC about 3 weeks ago. These are the specs:

Ryzen 5 2600

Rx 580

16gb Gskill aegis 3000mhz

500 watts be! Quiet System power 9

B450-a per max

960gb Kinston a400

Pure base 500

So far so good. However, I have had some problems for about 1-2 weeks. When playing games like LeagueOfLegends or others, my screen suddenly goes black. I continue to hear the game sound! After that I either come back into the game after a few seconds OR nothing happens anymore and I have to shut down the PC with a hard reset, i.e. By holding down the on / off button. I often get an error message after this has happened (see below).

=> I have updated the graphics card, chipset, LAN and sound driver!

I don't know why that could be. I haven't overclocked anything or done anything like that.

I have also noticed that my graphics card has a very strange performance curve.

In the picture below, the utilization of the graphics card always goes from 100% to 10% and back to 100% and so on.

What is important to mention: During this recording below, only Minecraft and OperaGX, so the browser, was running.

I hope you can help me. Perhaps a defect can be identified?

Greetings!

You could do a GPU stress test with Furmark

Is that dangerous"?

So what can happen there?

No. Unless your gpu is defective, but even then rather unlikely