7660g

hi guys i have a HP G6 2313AX which has a A10 4600M 6GB 1600Mhz RAM n 7670M 2GB DDR3 GPU now my question is i have being gaming on this lappy for a few months now but i cant understand one thing whenever i enable CF i get a FPS drop instead of a boost i dont get it i should get atleast a 30 to...