I am assuming you were able to get it running. I am now at this exact stall, but cannot figure it out. Any insight? I am useing 6 RX570, but after the 2nd one, i get no input. Thanks in advance
Apologies if you are already doing this (I can't be certain about what you've already done from your post alone), but use the graphics card in the primary x16 slot (almost always the physical x16 slot closest to the CPU) for your monitor.
It's not an uncommon mistake for people to load up the slots one by one (with an x1 slot often closer to the CPU), thinking the top x1 slot will work for the display. Some systems will automatically detect which graphics card is connected to a display, but others require you to use either the integrated graphics or the one in the primary x16 slot (unless that slot is not occupied).