I have everything currently working minus I THINK quick sync for the CPU integrated graphics.
The 980Ti is recognized, the 1080Ti is recognized, and Intel HD Graphics also exists. Airplay mirroring works, etc.
BUT! I still don't think quick sync is working properly so I don't believe I...
I've tried to get my 980 Ti to work correctly but sadly the one thing that is a problem still, is fan control.
Weirdly if I remove all aspects of fan control (The FakeSMC Plugins kexts, plugins,etc) I'll reboot, things still boot... But the fan speeds and card temps are read correctly...