This little device is perfect. In PC, I have a 650 Watt power supply and a 3070ti. I had a 3060 and a 2070 on risers outside of the pc. I wanted to be able to run everything off one pc, so I bought this. (I had an extra 600 watt power supply lying around)….I simply plugged in a 4 pin connector from my main PC to this device. Then I plugged in the 24 pin connector from my extra power supply….Made sure my two external GPUS were all and only connected to my external power supply, and thats it. It has worked great since. Of course, I had to run two USB wires from the risers in my case so I could plug into the PCI express slots, but yeah. It works wonders! Thank you! Cheapest solution yet!