True, well thanks for all the help. I gotta say I'm kinda surprised that Metro 2033 requires more out of your system then Crysis 2 (even with all the latest patches).
I don't believe Metro 2033 really does, unless you turn on PhysX along with DoF. Crysis 2 doesn't have PhysX and Metro 2033 doesn't need it. Have you tried to see a difference with and without GPU accelerated PhysX turned on? I have and I can't see a difference.