Artifacts? if no heat problem is a memory module that need reballing. You can test it with Tserver.
It's better to keep your GPU temp in a good position and avoid hot temp because this reballing thing isn't that easy, I've killed a GPU trying to reball with a 1200watt heater after watching several videos on Youtube thinking that I knew what I was doing.
1200watt heater??? you cant reball without the tools, i spend $400 for all the tools needed... I already fix 12 cards. ( i hate MSI armor cards...)
Reball MEMORY modules is easy compare with GPU reball...
https://youtu.be/m3oM3huKl8c?t=198By the way, Tserver is a way to do a fast diagnostic on a videocard that show no video or have artifacts. It run from a pendrive, on linux and the diagnostic is fast, cant kill you know what is wrong with a video card before send it to a technician.
Mats is the aplication for Nvidia cards (Tserver for AMD):
https://www.youtube.com/watch?v=QUWoz9vvHgM