Sadly I lost THE original BIOS, but I tried pretty much every BIOS for Vastarmor RX6600 or with the same subsystem ID in BIOS DB, the problem still persists.
Heyo, here's a fun little puzzle.
I have bought a broken Vastarmor RX 6600 Starry Sky.
Seller claimed that he tried to reflash this GPU with a Sapphire BIOS, which led to artifacts starting to appear on the screen. He tried to flash it back on to the original BIOS from the BIOS database but...