You can ask Sapphire Support directly if they can send you a link to download the original vBIOS for your RX 470 or you can download one from TechPowerUp : https://www.techpowerup.com/vgabios/?architecture=AMD&manufacturer=Sapphire&model=RX+470&interface=&...
Download GPU-Z and it will show you which vBIOS version your Sapphire RX 470 has installed plus it should also show the data for your GPU card in which you can compare with TechPowerUp to see which vBIOS is the one you need to download.
