I don't really know how to run a memory test. It still froze when i was just running one window of wow. Not sure if it took longer or not, wasn't paying attention. It's strange, I didn't really have a probIem for the first month or so, it didn't do this. Not sure if it could be patch related. I don't think its a heat problem either. I've got the cooler master and 5 or 6 fans running.