I don't believe that motherboard has on board video. Outside the realm of Intel and a few motherboards by smaller manufacturers, no one packages on board video. In the long run, it's a bad move, since on board video cards steal memory from your CPU and lock you into a particular model.
You may be getting confused since Nvidia now makes motherboard chips. These chips handle audio and handle other low level things such as controlling devices and peripherals. They aren't actually video chips.
If you haven't already stumbled across it,
Tom's Hardware Guide is an excellent place to read about all the different components of your computer and what the best parts on the market today are.
"No question is so difficult to answer as that to which the answer is obvious" -- George Bernard Shaw