24 Pin Main Second Dual PSU ATX Power Supply Motherboard Adapter Cable

I bought this cable to extend the capacity of connecting more than 9 GPUs. This cable helps synchronize the PSUs in order to make them start up right at the same moment. I have tried many tricks but the cable method is the only one that works.I would recommend this cable. It is not that expensive but works pretty well. I have to warn you, though, that connecting the 24-pin ATX cables from the PSUs and then to the motherboard is pretty dang hard. Take your time and be careful not to pull or bent your cable pins. Good luck!