Switchboard - Nvidia GPU Sync Issues

Hello,

I have a Virtual Production Studio and spent a week trying to get the GPUS to sync but without success. I have 4 Render nodes, each node has two Quaddro RTX 8000 with NVLink.
I have followed the Unreal documentation here:
[nDisplay Synchronization with NVIDIA GPUs in Unreal Engine | Unreal Engine Documentation]
Here is a switchboard screen shot:

It seems that the primary GPUs on each Nodes are in sync but within one node the secondary GPU is not…? Does anyone know how to fix this issue?

Also the second issue is the “present mode”, the Unreal documentation says I should be in " Hardware Composed: Independent Flip" but switchboard shows n/a…? ANy clue hot to fix that as well.

Currently I can see tearing on the LED screen between the respective nodes output area.

run listener.exe as administrator

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