Question i7-8700 GPU broken?

Hi

Computer has i7-8700 cpu, and it uses integrated graphics.
All worked fine, but now in all games some sort of artifact lines appear.
All drivers reinstalled and up to date.
What could be the most possible cause of this? MB, CPU, PSU ?
For example I ran Furmark test, and it shows this >>> View: https://imgur.com/a/gelbKVj

Have you looked at your cpu temps whilst running that benchmark? If the thing is overheating that would cause problems....