The BatmanAA_GTX470480_PhysX_Patch.zip file you have requested: Official Patches / Batman Arkham Asylum GTX 470 and 480 Rigid Bodies PhysX Patch - 2.81mb is not available. Perhaps try browsing all files for the game Batman: Arkham Asylum and upload any files you want to share or are missing. This is the only information we could locate:
This Batman: Arkham Asylum patch is only for NVIDIA GeForce GTX 480 or 470 owners. This DLL patch required to ensure that PhysX for rigid bodies works correctly in the action title.