RTX 3070 upgraded to RTX 4080 SUPER - awful performance 20 fps, no visible difference

User Support Hub Install, Performance & Graphics
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  1. Open the NVIDIA control panel.
  2. Go to Manage 3D Settings.
  3. Turn off Shader Cache.
  4. Save and apply changes.
  5. Reboot your PC.
  6. After the PC boots, open the Run dialog box or File Explorer.
  7. Type the following environment variable into the Run dialog box (Win+R) or the File Explorer address bar and hit Enter: %USERPROFILE%\AppData\Local\nVidia
  8. In the folder, find and open both the DXCache and the GLCache folder and delete all the items in the folders.
  9. Exit File Explorer.
  10. Now, go back to the NVIDIA control panel and turn on Shader Cache.
  11. Restart your PC.
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