dx 10 on crysis!

Hey guys i thort id just add in my dx 10 video of crysisi got a ghetto rig 3ghz p4, pc400 2 gb ram, 9800 gt 512 mb, but it runs smooth... on fraps i get roughly 25 fps but its capped me at 15 for some strange reading outside of the recording..?.. but off fraps its on 30- 35