I went in to energy saving settings inside os x and turned off everything except to put hard drive to sleep when possible, but it still can't seem to keep from crashing within a couple of minutes after boot and login. The fan presumably on the video card is going full bore constantly after login which I have read is common with the vega cards. I searched the site for things like "kgp vega" and "tuning vega", etc but couldn't really find the specific thread you were referring to. I found a couple posts from pastrychef that had some mention of an app to install to control video card voltage and fan. Does that sound appropriate or is there a specific kgp thread you could point me to?
Edit SSDT for GPU using @kgp's main guide.Great post! This was very helpful with setting up my Hack.
One question, you covered various scenarios for GPUs. What should I do if I intend on installing two Vega 64 GPUs or two Vega Frontier Editions.
Will do! I'm still on 10.13.6 until I'm ready to completely go AMD. One thing I have noticed is that when exporting in Final Cut Pro, it only uses about 25% of my CPU and doesn't use my GPUs at all. Is there something else I'm supposed to do?