What do you mean by doesnt recognize it, when you boot it up you are getting no display right? If thats the case then make sure its plugged in right and has the powercord on it.
There are no drivers to make a motherboard recognize a graphics card, its built into the ROM chip to do basic display functions. It's a hardware issue if you mean nothing is displaying (wether it means its not in correct, or something else is wrong im not sure of given what you have told us).