I have just installed a Evga Gtx 1070 Black Edition. in my Hackintosh I have DisableNvidiaInjection though shell command in a modified bios.
I'm using HDMIAudio-1.1 kext (added graphics card id to plist in kext I don't know weather it needed but I did it)
What works: all ports are working at correct resolution 1080p in my case HDMI Sound though two DP Ports to HDMI
Whats not working HDMI Sound Though HDMI Port & One DP port
the card seems to get hot when running bench marks in Mac os I think the fans are not speeding up enough
added a bench marks I've just tryed