In spite of the fact that Nvidia Corp. once promised to enable processing of physics effects made using PhysX application programming interface (API) on any graphics processing units (GPUs),
the company recently started to disable PhysX support on systems that use non-Nvidia graphics cards for rendering and Ageia PhysX or Nvidia GeForce processors for physics effects computing.
This mod will enable hardware PhysX support for NVIDIA GPU, when non-NVIDIA GPU is used as a primary display device. Only for WDDM 1.1 OS (Windows 7) and NT5 WDM OS (Windows XP/2003).

A poster on the NGOHQ forums received an email reply from NVIDIA support explaining the issue. NVIDIA says in part that the issue had to do with some “business reasons” along with quality assurance reasons. This apparently happens with version 186 and newer drivers.

The full email reads:

“Hello JC,

Ill explain why this function was disabled.

Physx is an open software standard any company can freely develop hardware or software that supports it. Nvidia supports GPU accelerated Physx on NVIDIA GPUs while using NVIDIA GPUs for graphics. NVIDIA performs extensive Engineering, Development, and QA work that makes Physx a great experience for customers. For a variety of reasons – some development expense some quality assurance and some business reasons NVIDIA will not support GPU accelerated Physx with NVIDIA GPUs while GPU rendering is happening on non- NVIDIA GPUs. I’m sorry for any inconvenience caused but I hope you can understand.

Best Regards,
Troy
NVIDIA Customer Care”

This mod will enable hardware PhysX support for NVIDIA GPU, when non-NVIDIA GPU is used as a primary display device.
- intended only for WDDM 1.1 OS (Windows 7) and NT5 WDM OS (Windows XP/2003).
- only for multi-vendor multi-GPU configurations.

VERSION HISTORY
1.01 - 02/10/2009:
- initial release

1.02 - 29/11/2009:
- added support for fixing new checks in 195.xx drivers
- added support for XP/2003 drivers
- both x86 and x64 are supported by a single mod now

1.03 - 21/04/2010:
- added support for fixing a timebomb, introduced in 196.75 and 197.xx drivers (gravity reverse + overall slowdown after a few seconds of PhysX processing)
- mod will now attempt to patch PhysX System Software files (helps to eliminate desktop extension requirement on Windows 7)
- mod will now disable "nvsvc" service autostart (helps to fix problems with fake displays)
- improved patching process (no more need to reboot in Safe Mode or terminate any process)
- improved patching logic (mod will no more try to patch non-existent files)
- improved accuracy of some patterns to avoid unnecessary patching

Размер: 2.28 MB
NVIDIA.GeForce.driver.19x.xx.Hybrid.PhysX.mod.v1.03.READ.NFO-iOTA