sweetnjguy29's Journal: New PhysX Chip not physically compatable with SLI !!!

According to Alienware's configuration website, the Ageia PhysX card is incompatible with GeForce 7900GTX cards in SLI mode, due to space limitations!
http://www.alienware.com/Configurator_Pages/aurora_alxr2.aspx?SysCode=PC-AURORA-ALX-R2&SubCode=SKU-DEFAULT

But, Ageia's website states that Alienware has 7900GTX in SLI with the PhysX card! What gives!?!
http://physx.ageia.com/get_physx.html

Do space limitations squeeze out the PhysX card on most Mobo's? Is it better to have one 7900 and one PhysX card or two 7900s in SLI? Anyone out there know?

Let the games begin!