estherau posted at 5:22PM Sun, 06 March 2016 - #4259581

You are right. there is a problem with video cards. I would love a faster card or more than the two I already have. eGPU is coming soon and then one can connect external graphics cards to the thunderbolt port. macvidcards

External GPU's have been around for a while. They lack the proper bandwidth. (Typically being limited to one lane at x4 (At best) for the entire external box on Thunderbolt 3 and the latest iMac and Mac Pro is limited to Thunderbolt 2. .)

And the trashcan Mac Pros are limited to AMD cards, which while OK cards, will not help with Iray, Octane, or Superfly.