Video Card Performance?

why is my game need for speed hot pursuit running choppyish on my ATI mobility 5470 i ran every option to get rid of choppyness but the only option that seems less choppier is when i slide my slider of my graphics card panel to performance than to visual. but i wanna run perfectly and not choppy every 10 seconds or so...can anyone help me fix this?|||To fix that you would need to upgrade your graphics card, however you cannot do that with a laptop.