Did some research and found this:
In order to enable Unreal Engine to work with multiple GPUs, you need to follow these steps:
- Go to the Project Settings in Unreal Engine.
- Under the “Rendering” category, select “Rendering Hardware Level”.
- Change the setting from “SM5” to “SM5 and DX12”.
- Restart the engine and launch your project.
This will allow Unreal Engine to use both GPUs for rendering, which can lead to significant performance gains.
Note that this step is only if you have a multi-gpu setup, if you only have one GPU it will not make any difference.
Also, you will need to make sure that your GPU driver supports the option of running on multiple GPUs and that the option is enabled.It is also important to note that not all features and features may be fully supported in multi-gpu.
Please let me know if it works!