Weird lines appear on computer when gaming.

I have this issue where my screen gets these flashing black lines on the left of my screen whenever I try running something demanding. This happened with my laptop and now, with a new computer (with the same files, games, etc), its still happening. Tried switching my monitor but doesn't solve the issue.

Video: https://www.flexclip.com/share/496775721abacdef93823c8b05f8f45a617c1f0.html