Not sure if this has been posted yet, but here is the Metal Knight Zero Benchmark right from the Nvidia FTP.
Realistic and efficient physics features
MKZ adopts the PhysX physics engine by Ageia. It has powerful physics calculating capability. There will be a large amount of destructible objects e.g. a whole building can collapse. There are also cloth texture effects, interactive plants and Rag doll death effects. Players can also use the physics effects to hurt enemies (e.g. dropping objects from high altitude or hurting enemies by shatterings caused by explosion). There is also a realistic vehicle simulation system.
A system with a physics card can perform hardware accelerated physics calculation to realize more complex physics effects