Hi! I'm using 3 Riing Plus Controllers, daisy-chained via the USB extension cables. with 12 devices (fans & pumps). The dasiy chain cables being way to short to span the width of my Core P7 case, I hat to extend the cables. The on-board double USB 2.0 connectors of my Gigabyte X399 (Threadripper 1950X) didn't work at all, so I used a rear USB 2.0 port with a USB micro cable. After the system starts, I have to unplug an replug each controller from the Molex 5/12V power ca