Where on the graphics card does it tell you what series it is?
Its usually on the front.
Nvidia or ATI and then some numbers if you tell us whats on the front of teh card or better send a picture we can tell you what it is.
You dont actually need drivers with some cards. I had an old card i used to update an even older PC and didnt bother with the drivers as it pluged and played passed testing so i left it