Yep it works on an Intel chipset, even the ancient i975x.
Warmonger, results @ a 1440x res. Max settings. CPU is a Q6600 G-0 @ 3.51GHz.
GTX 260 @ 760|2600 1580 = 93FPS
Adding an 8800GT @ 700|2000 1750 = 123FPS
As above but 1920x-
Single GTX 260 doing PhysX while targeting the sent gun = 71FPS
Adding an 8800GT @ 700|2000 1750 to do PhysX = 88FPS
Of course this is with 177.83 drivers and the latest PhysX.