Multi-GPU doesn't exist for anything other than ML or HPC.
While Vulkan fully supports it. Metal and DX12 don't.
The real issue for real time AR/VR/144FPS+ is knowing what you can/can't offload, what's the transfer latency, etc. this will change based on cards, generations, CPU's, library versions, Driver versions, vendors.
It is a nightmare.
Even SLI/XFire when you know there are identical cards, and drivers. You still see ~10-20% pref gain for 50% more resources.
While Vulkan fully supports it. Metal and DX12 don't.
The real issue for real time AR/VR/144FPS+ is knowing what you can/can't offload, what's the transfer latency, etc. this will change based on cards, generations, CPU's, library versions, Driver versions, vendors.
It is a nightmare.
Even SLI/XFire when you know there are identical cards, and drivers. You still see ~10-20% pref gain for 50% more resources.