It is going to be very slow and choppy with that system. Not sure why everyone reviewing it says it is not "graphic intensive" True, the graphics are sub-par and completely suck when you find out how slow they run. I remember a few people raving about how good the game looks for the minimum requirements. Yeah? Well the minimum requirements are way to low for this game.
I played WoW, awesome game. But the graphics engine is complete crap, really, seriously and no exageration.
EDIT --
Before someone tries to refute that, let me explain. The graphics engine is very low polygon count. It does a good job of looking good, while keeping the polygon count of a 1998 game. Yes, the art-work is campy and therefore in some ways, makes the game look beautiful. But from a graphics standpoint and the hardware that is required to run them, uhh... Completely rediculous.