the G33/G31 is an onboard VGA adapter that serves its purpose as a production machine. I used to have a PC with this chipset; it struggles with high res youtube videos! If you want to play WoW, you will need something more powerful. AKA, you need a discrete graphics card. I would suggest going with an ATI 5770 or higher for fluid rated with acceptable settings.
yea the chipset might load wow btu you'l get the infamous "discrete video is needed" and stuck in low settings at low fps ... if it loads at all , if he has a pci-e 5770 would work great for wow , though as WoW prefers nvidia archetecture he might get better framerates for less money with a gts 450