Its not that the games are forced into crossfire. I was told that supposedly the SSD is gimped on purpose because the NVMe and GPU 0 share lanes. I don't know how to test this, but if there was a way to see the firmware blob that would help.
From what I can tell the way it crashes is different between OS's, but consistant. Its not acting like a GPU Failure. Except TF2. Everything seems to hate TF2. Otherwise, no artifacts, nothing.
MacOS 10.15-14 latest w/ OCLP | 3D runs fine, no encoding, no game crashes even from Wine. 1350w1200r
Linux Redcore / Gentoo | Specific 3D works, Borderlands 2 / games that preload the map all work fine, except in Wine. If you try to run large asset games in wine, in general, from what I can tell, the system Halts, and completely Restarts. No artifacts, nothing. Reboots to EFI selector. Certain native games do this too, TF2 being an example, but most natives run fine. Changing Vulkan to OGL doesn't do anything. The current install has no OCLP so I have no idea if that is a factor yet. Supposedly the PRO driver helps, I literally have no idea as of yet. 1500w1380r
Windows 10 | With Adrenalin 22.3, the D300's identify correctly, clock correctly, and the fan can be controlled so I max it out. The encoders are useable and show up in OBS even. I can stream with the GPU encoders and play things like TF2 or Tarkov, but certain games seem to be a ticking timebomb. TF2 will outright blow up the machine after anywhere from a half hour to an hour and a half. Just like linux, boom EFI selector. Games that arguably take more resources, or are even more complex to run (Alien Isolation[Max Settings], Fable(CFX Enabled, full dual GPU render) do not crash the system. This is again not bound to any render system from what I can tell. 1380w1220r
I do not currently know the status of games like Garrys Mod, or what emulators will do. If push came to shove, I can really just use another machine and its not a big deal at all. But investigating this would be nice to do.