I think I may have figure it out, dp out didn't carry usb channel or data something. This display only work with DP alternate mode, witch means it only works with Sunix UPD2018 or Gigabyte GC-AlpineRidge(mobo should have Thunderbolt header).
Product Information:
Crystal-clear 5K video at 60 Hz
USB-C male connector to DisplayPort male connector
Multichannel digital surround sound
Anodized aluminum housings for extra durability
First 5K, VESA-certified USB-C to DP Cable
Bi-directional support for connecting DisplayPort (out) to...
When I changed platform_id to 0x19120000 or 0x193b0005, FCPX(10.4 or 10.4.1 ) runs 5k test , my Hacks will reboot immediately! FCPX 10.13.4 is okay with that. now I'm using platform_id 0x19120001, although with above platform_ids 5k render results got glitch.
I got i7 6700k gtx 970 high...
It does work for me. I removed IntelGraphicsFixup.kext,but boot time got a bit longer as usual. By the way if I set iGPU memory over 64mb OpenCL seems lose functional.
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