If you’re also getting issues in Skyrim it’s almost definitely a graphics card issue.
I would delete your drivers and use a cleaner to completely remove them (including any found remnants of NVIDIA drivers), then install the latest from AMD (completely remove old settings).
Make sure your card is getting sufficient power and is not overheating, use GPU-Z or similar to check GPU temperatures while under load.
If all this fails, I would return the card (fresh Windows install / put the card in a different PC optional extra troubleshooting).