I used two PCIE splitters: DCBTC2 PCIE Splitter.
It drives 8 GPU without any poblem.
I asked about the other mobo because I found really cheap price mobo + cpu + ram.
So i asked about it. I think i will buy one set and try.
Then i will decide to buy more or not.
Raisers do not have protection against short circuits and therefore video cards can burn out in the event of any malfunction. Miners don’t use this method now.
If you want to mine coins for a long time, then my experience has taught me to use new equipment. In the interval of 2-4 years you will lose more on failures and time on setup and so on. What you want to do will only work as a temporary solution, but nothing more.