I’m not sure if AMD have a tool to cleanly remove all of their drivers and bloat. But you’d need to do this first. (and reboot)
The shader cache is a Windows area…
The rolling cache is in MSFS….
You then need to create the rolling cache again. Mine is set at 16Gb
Next install the nvidia driver (personslly I avoid Gefirce experience as its jus badly written bloatware)
On my set up I change nothing in the driver and adjust the settings in the sim (remember you’ll need to restart the sim for a lot of settings to take effect)
Good luck