- Oct 7, 2011
- Gigabyte Z390 Designare
- i7 8700
- RX580 Nitro+
- Mobile Phone
Well the thing is that 5k on ATI cards is another beast. I had an ATI card and got the 5K to work but I ultimately need CUDA performance so I've switched to Nvidia.Crosspost from https://www.tonymacx86.com/threads/gpu-for-a-5k-monitor-dell-up2715k.204510/page-4#post-1452137:
I believe I've finally discovered the magical incantation for getting stable 5K support on the Hackintosh.
You MUST use the MacMini6,2 system definition. For some reason, this is the only sysdef that appears to allow hackintosh's to correctly support Multi-Stream Transport displays. I tried many combinations of editing framebuffers, AGDC settings, overrides, etc. None of it appears to matter. Just this sysdef. Wish I knew what it was doing as perhaps with the right edits we could use only a specific setting with any sysdef.
You need to use an ATI card. The FirePro W7000 works out of the box and has 4 displayports. I picked it because it is essentially the D300 on the Mac Pro 2013. I believe the W9000 will also work out of the box, tho I haven't tested it. But it is far more expensive.
Because of the weird ATI sleep/wake issues on Sierra, you will need to "sacrifice" an nVidia card to the Apple gods in your first PCI-E slot and set it to your primary boot display in the BIOS. The ATI card can work out of your secondary PCI-E and will stay active after boot completes. Sleep/wake should also work fine (obviously only as long as it was working fine before). In theory, doing this with the IGPU as primary should work too, but the computer and display attached to it will never truly go to sleep and you may have a phantom monitor as well if you do this. Maybe I can work around this with more tweaking.
I've only tested so far with the Dell UP2715K on my card ... i may test with the HP Z27q later as I do have one but the cables don't quite reach. We know monitors matter
The good news here ... no half screen cursor issues, no having to unplug the monitor and plug it back in when you boot, and hopefully no unstable sleep/wake issues with the nVidia drivers, but it will take time to verify the long term stability.
Are you saying that the MacMini6,2 would fix MST on Nvidia?