Name says it all. I want to run World of Warcraft in Crossfire or the new “equivalent” from AMD: mGPU. Are there any plans on multi-GPU support again in DX12?
Any chance there will be a Vulkan graphics API for AMD users?
To use Crossfire you may need to run in DX11 Fullscreen mode. Crossfire will not work in DX12. mGPU is not an AMD-only thing. It’s just shorthand for multi-gpu. The idea behind DX12 and Vulkan are basically the same. Lower level access to GPU hardware. Switching from DX12 to Vulkan may not be all that different in performance.
DX12 and Vulkan both expose multi-gpu setups to the developer and requires them to program for it if they want to support it. As opposed to the “driver automatic” AFR solutions of Crossfire/SLI. They are not compatible.
They may already support it in DX12 as I noticed a FPS increase of about 30% when not in town. In high populated areas the game is CPU bound.
From what I have read DirectX 12 provides lower level support to the GPU. Unfortunately in the past the driver handled the multiple GPUs as one however now it is up to the game developer to take advantage of the GPU resources in any way they feel works for the particular game. One writer showed how pipelining could work by doing half of the tasks on one GPU and finishing the other half on the other. Again, any technique to take advantage of multiple GPUs goes back to the creativity and investment of the Game developer.
It would be nice if WoW could just say … yes … someday we plan to make use of multiple GPUs. Why? Anyone with 2 GPUs likely paid a lot of money for them as NVidia heavily marketed SLI to us with ultra fast NVLink etc. We bought them and would like to be able to use them even if we have to wait.
It is unlikely SLI/crossfire in DX12 will ever be supported in wow. Maybe multi Gpu in the future. To be honest many game designers are not even supporting it in new games. Preferring to utilize multi gpu instead. The difference between multi gpu and SLI is multi gpu allows the use of any installed gpu to help with the rendering.