GPU mining Bitcoin is pointless. You would spend vastly greater amounts on electricity and upkeep than you stand to make back.
You should have a look at the
Altcoin mining section instead.
That said - mining list don't list every single card out there. Usually they are community-driven, so it takes at least 1 person with that card that can perform some measurements to add it - anything else would be speculation based on where it fits between other cards / calc units available, etc.