Please open Topaz Photo AI, go to the menu bar on the top and click the Help > Open Log Folder menu option. Attach all the logs files that you can see in the window that opens.
I should be able to determine what is happening and send next steps with this information.
You may need to run the Topaz Photo AI installer again to get the model files for this new graphics card. You can get a new installer from the downloads page here: https://topazlabs.com/downloads/