How do i increase the performance on my video card?

i play alot of world of warcraft, and i often find it annoying that my frames per second are so low, and the game is all choppy,

i dont have money for a better video card but is there a way that i can improve the performance of my current card?|||well I guess telling us what card you currently have would help a little ya think ?|||go into your bios and overclock the card|||if you have a nvidia based video card, use rivatuner, just google for it, it's freeware|||Try adding more ram about a gig and try defraging your computer and not running any other programs when you run wow

and that should help but really it's all about your card and processor also and available ram|||to get the best performance you would have to over clock your graphics card in the utilities options.BUT DOING THIS CAN CAUSE YOU TO FRY YOUR CARD OR CAUSE GAME CRASHES JUST DONT GO TOO FAR