MojoKid writes: "It was recently discovered that NVIDIA drivers released after the 185.85 WHQL series (i.e, 186.18 and higher) removed the ability to use an NVIDIA GeForce cards graphics card as a dedicated PhysX processor if an ATI GPU is present. When asked for the reason behind the change, an NVIDIA representative stated: "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." From a certain perspective, this definitely makes sense. NVIDIA has invested a lot of money into the acquisition of Ageia PhysX and PhysX development; the company has good reason not to want to hand all its hard work over to a competitor. However, NVIDIA is running a significant risk. Customersâ"particularly those who consider themselves loyal customersâ"may very well see the forced incompatibility as a predatory move intended to force customers to use NVIDIA solutions."