System Specs and playability

Oi mates. Ok, in what order do these ATI cards come out?? I heard that the x850 beats my x700, and that my x700 follows after the x1300, but what about the latest ones such as the x1900 and x1950?! Someone please tell me how my x700 compares to other cards. Also, how much further must i "jump" up the ladder of cards to get a noticeable increase in performance?

thanks.

There u go: http://www23.tomshardware.com/graphi...=569&chart=204

Check a few specs, u'll notice that it is worth changing your card.