4+ Nvidia A-series GPUs

It is understood that UE supports 2 NVLink GPUs across some processes. i.e. Lightmass building.
It is not yet clear if UE supports 4+ NVLink (2x2) GPUs on a single OS.
Can it be verified how many GPUs are supported under a single OS?
GPU example is Nvidia A6000.

How is this helpful to the community?

The aim is to determine if UE will utliize 4+ GPUs efficiently and in which areas, such as Lightmass and possibly others. Finding this out will enable some to perform benchmarks for efficiency.

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