Sierra 10.12.6
Definitions 17.1
Lenovo Thinkcentre M800 i5-6400
Gigabyte GeForce GTX 750 Ti (2 x HDMI + 1 x DP + DVI)
nVidia latest Web Drivers 378.05.05.25f01
Dell P2416D 2K monitor
Using Lilu.kext & NvidiaGraphicsFixup.kext
I can only get display working on a middle HDMI, other HDMI & DP produce NO signal, did not try DVI (so no multi-monitor possible)
Any idea how to get all ports to output? I really only need DP to also work...
EDIT
Turned out that I had to set Video in BIOS to be PEG, as Auto was giving the very problem
Once set, DP works (as well as HDMI, DVI untested)