hi @IntellMove ,
There was undocumented support for mGPU in 5.2 ONLY it was Experimental
However, due to major problems with shadows in 5.2, there is no LGPU for 5.2.
Others investigated, and Vulcan drivers were found to support mGPU in 5.3, but that means no DX12 Hardware support.
mGPU has been replaced by nDisplay.
There has never been support for Ndisplay in LGPU.
Nvidia removed support for mGPU and leaves only SLI.
UE4 DOES NOT have mGPU’s official support. The LGPU has NEVER supported Multiple GPU.
Please read my investigation in
So, they killed Multi-GPU mGPU in 5.3 and 5.4? - General / Feedback & Requests - Epic Developer Community Forums