Well I have used the ops
@mattystonnie vega kext on a MSI Vega 56 airboost and the results are mixed
first the negatives
for me the SMU fan bug is here hard.. and I found no way of defeating it while the force falcon SMU loading took place so the machine would howl and fans would not throttle once spun up... huge negative
second, the video ram never downshifts from 800 to 500 at idle and the activity light bar on the card constantly pulses full like its on crack when the system is idle.. can't be good
Frequency reported for the card is wrong, no power reporting.. etc
bench negatives
I saw no improvement in luxball nor an increase in video toolbox encoding to h256 .. so in real world apps vs synthetic benches.. the increases may not have much effect
pluses
now the synthetic GB4/5 benchmark improvements were dramatic
GB5 went from metal 58300 OpenCL 5033
to 80286 64148
at the cost of a howling non stop fan and crazy coil noises etc.. so not sure this is all that good for hardware longevity
I am betting that when put agains real world workloads, the apple engineers MigHT have gotten it right and tuned the settings for their pro apps to get the most out of AMDs broken SMU firmware
I am cleaning up the airboost 56 fan kext to add some addl function like ADPM and injecting video bios info but I think that the performance of that kext is more than good, with much better thermals, a card that clocks down properly, is likely more the way apple coded their software for.. and I can hear myself think!!