What process did you go through to make the switch? I have 1080 and am trying to switch to an AMD but so far, I can’t get my system to boot.
I think starting point is important. I did update from working sierra to high sierra.
Then I updated nvidia drivers without any problem.
When I've decided switch to AMD, I've done following:
1. Uninstall Nvidia drivers (Click at "uninstall" button on nvidia preferences panel)
2. Add Lilu and WhateverGreen kext. I've downloaded last version of these kext from github.
3. Add these kexts to /kext/Other folder on EFI partition.
4. Change SMBIOS from 14,2 to 6,1, add nv_disable=1, Inject Kexts = YES (System Parameters tab)
5. Updated motherboard bios
6. In bios I've choosed only PCI videos
So, that's all. I've attached my config.plist, try it.