I honestly can't remember if I mentioned this previously so apologies if I have. About 50% of the time when I boot up a session I'm getting very low frames per second (approx 20-30). I have to exit the session and go back into it a number of times before the frames go back to the usual 80-100 per second. It's beginning to get frustrating. I usually start off with no A.I, graphics are set moderately and post effects set to low... it's not like my system can't handle it... when it works it's buttery smooth. Any ideas what this could be?