> With full Talos II I have option in future purchase second CPU,
> and utilize other slots

Ah okay, for future expendability, makes sense. I've been well aware that the amount of active PCIe lanes/slots depends on the number of installed CPUs, so I wondered about that full Talos II with only one CPU... ;-)

> 1 OcuLink x4

AFAIK, the OCuLink port is not usable (see comment #76).