FYI - Batman demo to download with PhysX...

[zanzabar]

Some other people have been trying out PhysX on the CPU through the in-game menu & are getting as low as 12 fps.

Are you sure your fps did not dip into the 12's ?

yes it dropped to 22 minimum with frps i had the fraps fps going for lvl1, lvl2 was low i didnt bother with fraps since it lagged

XS users are not the same as other forums and i do have the fastest single gpu card and a good oc on the cpu