My only issue with Camstudio is the lack of motion capture. Watch a youtube video comparing camtasia to fraps. Hell I even have both versions on my youtube if you want to see. Camtasia just CANT follow movement without skipping to hell. Fraps can.
I have an AMD Phenom II 955 BE 4x OC'ed to 4.0ghz
2 HD5770's
Framerate drop in ff7, 2 in battle, 6 in field.
Framerate drop in Dirt 2, GHIII,Resident Evil 5, Spore, Prototype,Etc is NEGLIGIBLE.
Sometimes you can see it dip from 60 to 59. Ive always wondered why such an old game would slow fraps down worse than Resident Evil 5 at 1920x1080 Max Detail with 32x Forced AA and 16x Anisotropy with triple buffering and all other possible options selected.