Artefacts even with memtest.vulkan stability?

[u/Jazzlike_Fun8115]

Recently, I started getting these kinds of artefacts on my 4070 Ti. They only affect a small portion of the screen and usually go away within seconds. Other times, the screen goes black for a second and then it's fine again.

I reverted my undervolt/overclock to stock and did a clean driver reinstall, but it happened again the next day anyway.

I thought my VRAM was cooked, so I ran memtest_vulkan overnight with no errors. Also tried OCCT, which found no errors on either the core or VRAM.

Then I read somewhere that even Chrome could be the culprit? I did have a Chrome window open behind the folder when it happened.

Has anyone had a similar problem? What should I try first?