it will allow you to play wow but not at high framerates or settings. you will likley need a new gfx card (dedicated) and a new PSU as the 1 that came with is likley to be just enough to cover the unmodified system. and a dual core i3 ??? unless your gonna oc the gubbins out of it,,,, why? today if your buying a gaming rig you buy a quad... so rectify that soon.