Laura-
You might take a look at these charts. They will give you some idea how the 
different cards stack up based on their tests.. This site is considered 
reliable by many . Also, there is one or two other sites specifically 
oriented to the gamers needs. Don't have the URL's handy but try 
googling.http://www.tomshardware.com/site/vgacharts/index.html

HTH
John Dinges 

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