For me, Fraps takes my FPS away and I haven't even tried Camtasia; so i use Bandicam. Its free, but leaves a Bandicam.com watermark, and only records 10 minutes ( just make a new recording ) . You can check out a testing that I did: youtube /user/BallzTohTheWallCraft?feature=mhee#p/u/0/k7FFOibBRxA
I hope that I helped