I have never used the BNC cable myself. However we have a few at work. The cable which has 4 BNC cables (Blue, Green, Red, and a fourth that is black not sure contrast or something) It is possible to get a video card with these outputs however they are hard to find and are usually expensive. Good luck finding one that is a GeForce 2.

I'm not sure what cable you are talking about for $16 but if it is the on that has a DVI on one end for the Video Card and the BNC on the other for the monitor. I don't see where you would see an improvement. To see it if there is one, you would have to get a video card with these BNC outputs. The intentded use of this cable is an adapter for monitors that only have BNC inputs. So that people can use the less expensive, easier to find DVI output video card.

I know this probably doesn't help a whole lot but it could explain the use of the cable if it is the one I think it is.