I had a really interesting experience recently. I just bought SoM and had read it had some problems. So I booted it up and the only problem I noticed was that all the menus were screwed up. So I had fraps running and it seemed to be limited to 100fps. It was running at 100fps almost the whole time I played it but would occasionally dip down to the upper 80's. I was totally happy with the performance! That was the first time I played it, and i played for about 3 hours. Ever since that time, every time I play it there are massive slow downs, like it freezes for .5-3 seconds at a time! I'm just confused as to how my first experience was near perfect but every one after that has been just terrible. It gets a bit better when I disable crossfire, but the performance is still pretty shotty.