First of all, i'd like to welcome you to Driverheaven!
Now, the first thing you can do is take a picture of it on front and back side of the card. post the pictures here, and we could hopefully identify the card for you.
also, the other thing you could do, is install it in the machine it will be going in, and install some older drivers, such as the
Catalyst 6.11s as those will support cards as far back as the Radeon 7000 series cards.