I currently use an Nvidia GeForce FX5900XT vid card, and often my computer lags or hangs in intensive areas when playing World of Warcraft. The fps is decent when the game is steady, but it gets pretty choppy in big areas with lots of people. I have an asus p4p800s mobo, 2 gigs of 2-3-2-5 ddr400 ram, p4 3.2 w/ht, and 120g wd 7200 rpm hd. Would something like this: http://www.newegg.com/Product/Product.asp?Item=N82E16814130203 make a a big difference? thanks