@CaseySJ I am using a Vega 64 and I have tried several SMBIOS and iGPU settings. I get the best performance plus working DRM streaming in iTunes, working Netflix in Safari and fastest H264 and HEVC (8 bit) encoding in Final Cut Pro with the following settings:
iMacPro1,1 SMBIOS plus iGPU in headless mode (with all the needed settings in Devices -> Properties in config.plist)
When using iMac19,1 instead the performance seems the same, but DRM streaming in iTunes and Netflix in Safari doesn’t work. Using
shikigva=32 and
shiki-id=Mac-7BA5B2D9E42DDD94 solves the iTunes DRM problem, but not the Safari Netflix problem.
When using iMacPro1,1 with iGPU disabled iTunes DRM and Netflix in Safari works, but video encoding in Final Cut Pro is much slower.
So is there any reason why I should not combine iMacPro1,1 with iGPU in headless mode, since this seems to be the only combination where everything is working and where I have the best performance at the same time?