Green stripes on the screen?

I have had green stripes on my monitor for a few days when I play certain games. It can't be because of the monitor because I tested it on 2 different ones. I also have the latest graphics card driver. I only have this problem when I play games such as Monster Hunter World or Outlast. I don't notice any graphical problems on Youtube or Twitch.

Screenshot from Monster Hunter Wold:

(In some games it is more pronounced than in this picture)

These are called artifacts and there can be many reasons for them.

https://de.wikipedia.org/...tergrafik)