Why dont work MERCURY P.E. with GTX 660 (hacked) in cs6 and 5.5? i dont see amazaing playback speed

i dont see amazaing playback speed up but for example the three way color, ultra key etc.. effects works. and the multi cam is horrible. CPU always runs in high clock speed, somtimes gpu clock speed goes up to 10 %.its not enough, its too slow, lagging.. thanks for help