I only purchased SC1 so dont know what the framerate is like on the other two but i can definately tell when it dips. Just expected it to run 60fps+ constantly. Don't know if its just me to be honest but highly doubt it. Got a fat model PS3 plugged into a Dell 24" monitor through DVI and I dont have problems with other games. It Seems to happen whenever there is any of the fancy lighting effects shining through windows/lights etc. Still enjoy playing it though!

