I have a Gateway GT5620 Desktop ,so what is the video card i need to buy to play for the starcraft 2?

or i need something els, cause when i played it, the computer is so lag|||Starcraft is designed to be played at a VERY low quality.

Here are the specs:

http://us.blizzard.com/support/article.x…



You really dont need a particularly powerful computer to run it...