You have the hardware fine, wow has its server side issues; as mentoned expect some lag due to that. Believe it or not, this game will still eat up a gig of ram, so at max settings youll still get good performance but in some areas it will slow down a lot. Some of the issues are do to coding, but dont expect to enter the auction house at iron forge without some slow down, in particular if your connection is bogged down or slow, the game will reflect that, data is two way after all, turn down all them settings and you should still be fine.