ATI card running with Nvidia card for PhysX
Sledgehammer70
California Icrontian
Before I truly jump into making this work I wanted to see if anyone has had success doing this. I know Lordbean has gotten it to work? but I haven't found any good articles that show you a good order to make it all jive. In that I am making this thread to get help for myself & hopefully for others also trying this out.
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I've got an article about it coming eventually, but first I want to play through the game again running with PhysX off in order to compare the gameplay.
Long story short on the installation:
Download this patch
Install Forceware 195.62, reboot into safe mode
Run patch
Reboot into normal mode, connect and activate a secondary monitor on the Geforce adapter (yes, the second monitor is required - the NVIDIA software still goes inactive if the geforce is not driving a monitor)
After following those steps the NVIDIA control panel should let you turn on hardware PhysX even when an ATI adapter has the primary monitor.
It's possible the drivers just aren't meshing correctly with your cards. Whereas my setup involves only a single GPU from either manufacturer, yours has hardware CrossfireX and SLI, and the problem could be originating from one or both. No way to tell, unless you have a single-GPU Geforce lying around you could test. That would tell you whether it's a problem with the 295 or not.
I did a safe mode graphic driver clean out and installed the new 9.12 drivers again and the issue still occurs. I than reverted back to the beta drivers (doing a deep driver clean before hand) and the issue is happening again. Makes me wonder if it is the card or the drivers or the OS?
It only happens when I am just sitting on my desktop doing basic stuff.. (internet browsing, listening to music in itunes etc..) When I game all seems fine.
Just noticed this post, figured I'd drop some information to help alleviate any confusion here...
Catalyst AI MUST be turned on when more than one ATI GPU are present in order for Crossfire to do anything. If you disable the Catalyst AI, the PC will only use a single GPU to do rendering, even when Crossfire is enabled (and even when you have a card with two physical GPUs on the PCB). In fact, setting the Catalyst AI to advanced mode enables a sort of tag-team system where, as I understand it, each graphics card takes turns rendering a frame, which increases performance significantly over having AI on standard.
So, yes, Catalyst AI is for hardcore systems, too.
For now I dropped back to my GTX 295 and it runs without any issues. I shall wait for ATI to address some of the issues.
In my mind, the NVIDIA chips probably haven't significantly changed much (apart from die shrinks, minor features, etc) since the introduction of the Geforce 8000 series. Every NVIDIA GPU in the 8000, 9000, and GT200 line supports the same core set of features - DirectX 10.0 and CUDA. The Fermi Geforce series is going to be NVIDIA's first major chip revamp in a long time.