> Because of things like CUDA, there are whole domains people can only use Win/Linux for.
Pretty tiny domains, though.
Pretty tiny domains, though.
Honestly, those are the only professional use-cases for multiple GPUs I'm aware of. CAD uses GPUs, but not multiple and I don't see AMD having any lead over Nvidia. Same with other uses like GPU acceleration in things like Photoshop or video editing--1 decently fast consumer grade GPU is enough. I don't see farms and 4+ cards per box.
Adobe Media Encoder (and by extension Premiere and AE) can do multi-GPU rendering as well, which starts to matter when you have huge comps. I've worked with 2D animators who need to turn around footage really quickly and a bunch of them are on multi-GPU rigs.
Adobe Media Encoder does seem to support OpenCL and CUDA, but the GPU acceleration only looks like it works with certain transforms and filters, not with encoding. So I can see it helping 2d animators, but much less so for video editors--especially with multiple GPUs.
I feel like GPU rendering has been teased for like 10+ years now. Only within the past few years am I seeing studios upgrade their render farm in earnest to accommodate GPUs.