RO2 has, for the 42 hours I've played it so far, run beautifully. Up till now. When I last fired up the game, I would get HUGE amounts of stutter cut up by short periods of normalcy. I have 8gb of RAM so memory definitley ought not be a problem. (If it matters, I was running an avast! scan last time I played, but I played a couple games earlier today and it seemed to have minimal effect on them)