For Gods sake we've already answered this one. OP never mentioned he had a laptop though. Just noticed the 660M thing. Try closing down all other programs you have running and use game booster and un-install stuff you dont need from the laptop. Theres nothing you can do aside from trying other recording softwares because we know you've done every thing else. Try allocating more ram to minecraft there must be a guide on youtube on how to do that
Is it a dual core i7? Or a quad core i7? Having a quad core CPU means that two cores can be dedicated to playing the game while the other two cores encode the video. Both gaming and video encoding can be pretty demanding on the CPU. It can still get choppy, but not as chip as if you were to only have a dual core i7.