Originally Posted by BarbaricSoul
I'm not positive about this, but I believe it's only reference 1gb 6950 that are unlockable
Actually the 2GB models are more often unlockable, as they are identical to the 6970. However, many 1GB models also unlock.
It has been proven that some non reference cards unlock, but there are no guarantees.
It's a gamble buddy, no one can tell you for sure.