I upgraded 2 real Macs and one Hac, the Hac was fastest to complete, i.e. my trusty 3770 on a Gigabyte Z77 mobo, this computer has a NVMe hard disk and boots from it via O.C. and modded BIOS.Success. It is getting to be anticlimactic. Clover 5144 with kexts just updated to current two days ago. No need to do anything but update from the system preference pane. three restarts, all detected correctly and no graphics issues. Working now!