What's the best game recording program with no lag, no fps drop, and works well?

You've already tried most of the higher rated recording programs, you'll more then likely need to upgrade your computers CPU. Not much more you can do, maybe install a few applications like Razer Game Booster to help improve your computers performance, and record at a lower resolution.

Try recording with Bandicam. It encodes the video while it records, and therefore writes much less data to your drive. This could also improve performance, if your drive is what's slowing you down. It also uses GPU encoding, provided you have the right hardware.