What is the max number of phoenix cards I can use with a new mac pro?
Is it different if I wanted to use Black Magic Thunderbolt cards? Not even sure if you are able to use more than one anyhow, just curious.
I have a project where I would like to use 3-4 HDMI inputs from other computers.

Also is it possible to get something else into catalyst using like syphon or some kind of "virtual capture driver?" I am thinking like another window running on the same mac. Or perhaps video streaming from another computer.
Any thoughts?

Thanks!