Don't those Ada 6000 GPUs support NVLink? I think I can even see the cover for the connectors in OP's pic.
edit: Hm, finding mixed information online on whether that's still supported or not. Apparently it was removed in workstation GPUs.
Nope, they don't support it. And afair even if they did, you would be limited to connecting only in pairs, not all 6 together
Nope, they don't support it. And afair even if they did, you would be limited to connecting only in pairs, not all 6 together