two 580X MPX cards in a 7,1?
Is there any advantage for video processing to installing two 580X MPX cards in my Mac Pro 7,1?
Question marked as
Maybe.
1) Are you planning to run two different GPU-limited video processing applications at once? If so each could, with minor difficulty, be setup to use a different GPU.
2) Does your most frequently used or demanding application have application-level multi-GPU support? Application that do can split their load to run a little faster.
3) Do you need to connect more monitors than a single 580 will support? More GPUs provide more display output.
Otherwise no.