eight slot motherboard 180
https://www.ebay.com/itm/124646793866?hash=item1d0587228a:g:tQgAAOSwpdpgWYIr
You can explain why this motherboard has 8 6-pin connectors on the top and 8 6-pin connectors on the right (if you look at the picture).
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I found the answer to my question. But I still do not understand why this should be done. If the video cards have 2 power connectors, then you will have to connect the remaining connectors from the power supply.
I always thought that the smaller the connections and adapters, the safer and easier the mining farm is to maintain.