I wonder why using 2 PSUs resulted in having slower interconnect. There is no specs in this blogpost regarding cpu/motherboard choice, but if you go with threa

I wonder why using 2 PSUs resulted in having slower interconnect. There is no specs in this blogpost regarding cpu/motherboard choice, but if you go with threadripper pro they have 128 pci-e lanes for some time now, so using all GPUs at full speed shouldn't be a problem