Unreal 5 DX12 multi gpu

Development Getting Started & Setup
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1

Hi everyone.
I would like to start to make my first game.
My question is does UE5 supports DX version of explicit multi-gpu?
Or any software based multi gpu computing?

2

Hey there @KiKiHUN1! Welcome back to the community! So Unreal has support for NVLink and SLI, but unfortunately not for rendering tasks outside of the game, so no easy way to render farm.

3

I meant the DirectX verison of “sli”.
Like ashes of singularity has.

4

Ahhh that’s DX12 mGPU I believe. I had heard (but not experienced) that in 5.1 the experimental support had been added/updated but there’s no listed documentation I could find for it as of now. If you give it a shot, let me know! I’m curious about it as well!

  • Added support for multi-GPU rendering (mGPU). SLI is required. To enable it, pass -MaxGPUCount=2 on the Unreal Editor command line and set r.PathTracing.MultiGPU=1, which can be toggled at runtime. (r.AllowMultiGPUInEditor=1 is no longer required in .ini files to enable mGPU in the editor.)