ASUS ROG G50AB = M6H unlock

hello,
I have a mother board asus blocked (without've tweaker) I'd like to know if a change can be

model = asus rog tytan G50AB = motherboard => maximus VI hero / g50ab

and it has the same true maximus VI but the bios does not work (security validate failed)

Current bios 701 => http://dlcdnet.asus.com/pub/ASUS/Desktop...zip-G50AB.

thank you in advance