Article taken from GamingOnLinux.com.

A commit that just landed in Mesa-git allows for 'radv', the open source Vulkan driver for AMD GPUs to use multiple devices.This will likely be useful in future for people who have two (or maybe even more) GPUs to really push their games.Support for things like that on Linux should improve as Vulkan evolves and is adopted by more developers. Just how useful this will end up being is the real question.Using multiple GPUs in Vulkan is going to get easier with Vulkan-Next, where it's planned to have multi-GPU support in the API directly. So, you won't need Crossfire or anything like that, as developers will have access to all your GPUs directly from the API to spread the load.You can see the commit here Is anyone here actually running a desktop with two AMD GPUs?