How you know that isnot for mining?Welcome to the forums, newcomer!
Might want to cross reference the existing VBIOS on the card with this database;
TechPowerUp
Extensive repository of graphics card BIOS image files. Our database covers submissions categorized by GPU vendor, type, and board partner variant.www.techpowerup.com
As for your 'fake' referral, are you meaning to ask if it's a VBIOS meant for mining?! There's no such thing as a fake VBIOS, only modified ones.