I have one of those cards -- it's how I started out last month
NVidia doesn't do NEARLY as well as ATI. It has to do with how the cards are designed, and what Bitcoin mining requires of a graphics card.
And yes, that card is a bit old on top of it. I bought mine 2 or 3 years ago for $70 I think.
Everyone here has basically the "cream of the crop" when it comes to mining-friendly graphics cards. Many of those cards are out of stock to 95% of the population -- everyone's been buying them up!