i checked but no luck, they have 2 rx 480 powercolor red devil and rx 470 red dragon but no rx 480 red dragon. It is confusing to me that all those bios versions are 256kb so I assume mine should also be 256kb. I used GPUZ to back up my original bios, but when I open it in Polaris bios editor it says that it is less than 512kb and it could corrupt my graphics card. Please help.