Yeah, I also think that this isn't legal either. It would be even worse if nVidia had a quasi-monopol like Microsoft does (well they don't but it still isn't legal).
Especially, since it worked before. The purposely removed a "feature" of it.
Anyway, is there no workaround for newer drivers because the last working driver (185.68) has extremely slow PhysX performance under Windows 7.
After all some of the NGOHQ.com-staff has been working to get PhysX to work on ATi cards too, so you should have the "highest" knowledge regarding this..?
I compared PhysX FluidMark results with 185.68 and the current Beta with the same resolution settings (1024x768) and everything set to run on my 9600GT Green Edition and with 185.68 - actually with that driver it doesn't really matter if I use the ATi as graphic card and 9600GT only as PhysX; I get more or less the same BAD results - I got a minimum FPS rate (once I reached the maximum particle count that was also the average FPS rate) of 17-18 FPS and with 190.38 Beta I got 43-44 FPS (however with e.g. 1920x1200 I also got only 17-18 FPS, I am mentioning this because I also did ATi graphic card and 9600GT tests under XP x64 with 185.68).
That is a huge a gap and of course decides if various games are playable or not (e.g. Sacred 2 with PhysX enabled isn't playable under Win7 with 185.68 because of the performance - it might not even work perfectly with the better performance but definitely better). Actually, the best results I got under XP x64 the last time I tried it with 185.68 because there I could use the ATi for graphics and the 9600GT was just PhysX that way I was able to achieve those 43-44 FPS minimum FPS rate EVEN at a resolution of 1920x1200
Anyway, because of this my DirectX11 card will definitely NOT be a nVidia graphic card which I had originally planned (mainly I intended to buy one because the Linux drivers are still a bit better but ATi is catching up and I could still use the 9600GT and switch between the ATi and that one as I do currently). This is just TOO customer unfriendly.
Not to mention that I also ask them regardging this "issue" - originally thinking that it was a mistake - and the answer was after a while more or less that this was "removed" intentionally AND that I should buy ANOTHER nVidia card if I want to use it.
Come on, why should I buy ANOTHER one of your cards after getting such poor customer support?
For those who are interested at what response I got after a while:
Originally Posted by nVidia Support
Thanks for waiting. After a bit of research on your issue with our engineers, the ATI card will have to be disabled in order for PhysX to work. This was change in newer driver as you already experienced. If PhysX is needed, I am afraid you may want to consider installing a 2nd Geforce card for the additional monitors.
Sorry for the inconvenience. Let me know if you have any questions or concerns.
What they didn't seem to get is that the nVidia is the additional card, mainly because of Linux...