In my setup, I have an i7-3770k with HD4000 graphics running my primary display, and a secondary display running off a GT640. I also have a GTX68 with no monitors to speed up renders in Resolve, etc. This is all in Mac OSX 10.9.1. When I open AE CC and go to preferences/previews/GPU information, it shows both Nvidia cards under CUDA, but under OpenGL, it only lists my HD4000. Ideally, I would like the GTX680 to do as much work as possible. How can I tell AE not to use my internal graphics?
p.s. I am running current versions of AE, OSX, and CUDA drivers. I do not have Nvidia drivers installed since they are not supported in Mavericks.
The only thing that comes to me right off the top of my head is switching slots.
After Effects will use the GPU that is driving the monitor for OpenGL. That is all that makes sense, since all that After Effects uses OpenGL for is to accelerate drawing to the screen.