what are your system specs? There are lots of posibilities ranging from a slow CPU to not having frame limiting set in the GPU causing thing to run too fast (50fps pal and 60fps ntsc are pretty much the limit, faster makes it choppy as well as slower making it choppy)
Either way we need your system specs(CPU, Ram, Video card, etc...) to even begin to figure it out..
Either way we need your system specs(CPU, Ram, Video card, etc...) to even begin to figure it out..