bagginsbill posted at 10:13AM Tue, 22 December 2015 - #4245289

Aha! See the manual said NOTHING about that. So either they extend the menu with all 2^n combinations of GPUs you have (which if you have, for example, six, would by 64 combinations) or they just add one menu choice that represents "Use All".

Seems really odd to not just pop up with a list of checkboxes.

I couldn't agree more. There is a reason it is a list of checkboxes in the advanced render settings in DS for Iray.

Note the current high end Motherboards can handle 3-4 Graphic cards at full speed.