FPS serious problems and i have a good graphic card.

thats my laptop spec : http://www.mediafire.com/view/myfiles/#lupvbxmkk74hwtb and http://www.mediafire.com/view/myfiles/#2k6nnzd26z6xd6l . i can run many games like farcry 3 or crysis3 or AC4 perfectly. but when it comes to CF i have 40-60 FPS when when i start shooting it drops. idk what to do..i've tried many things but they dont seem to be working. a friend has the same spec but he has 200 FPS..my laptop is DELL and his laptop is Toshiba but they are exactly the same spec. only difference is he has Nvidia graphic card and i have AMD radeon. can you please tell me how to increase my FPS?

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