Hi there

Yes Poser Pro 11 will see all multiple CUDA enabled cards,in my case I've tried multiple combinations like Titan X with GTX980Ti and two GTX780 and Poser has seen all cards without the problems on friend PC(he have PP11 on his PC,but we are tried my GPU to do few test renders)

Just bit of caution,tried to render my old scene where I've lots of props and lots of 4k maps with several V4 fully clothed etc and I've got CUDA error/crash,I think this has been down to the how is CUDA implemented,how to say,in other SW you can assign which is main GPU and which will be as second assigned,because this error has been "not enough memory" on GTX780 which is only 3GB,but I rendered with GTX Titan X with two GTX780,strange thing,but works

Hope this helps

Thanks,Jura