XFX RX 590 Fatboy OC+ working using the fakeid method + vbios flash to Powercolor rom (Thank you Gigamaxx). Only extra thing I had to do was enable iGPU according to another forum to fix random freezes.
Which sapphire? Pulse or Nitro +?Looks like the XFX Fat Boy has same issue. Just picked one up and it’s not working. Kernel panic unless I use fake ID 67CO but no acceleration. It loads Framebuffer but not accelerators.
Looks like PowerColor is the only one working so far.