Please do not start another one of threse threads. There are already too many of them on this site.
ATI and Nvidia both make various video cards of various qualities, and you should look at the cards performance not nesecarily its chipset company.
Some people just prefer one company over the other.
Think of ATI and Nvidia as you would with Intel and AMD... They are just different manufactures with their own models that have their own performance levels.
Can a moderator please close this thread?
CompTIA A+, CompTIA Network+, Cisco CCENT, Cisco CCNA Routing & Switching