Hey, so turns out I happen to have an RX Vega 56 that should never have passed quality control. After many long hours I discovered that the core voltage needs to be raised +31mv or it will crash when anything hardware accelerated is displayed. I did this via MSI Afterburner; however, now and then (and I think on boot), Afterburner doesn't remember the configuration. The best solution would be to modify the bios so that it is always overvolted, but after some research I don't think that is possible.
Any suggestions are welcome , thanks!