I plugged it to my GPU rig, powered by Thermaltake Toughpower 1500W. But for day to day use, any ATX power supply will do really, as long as it have 2x 8pin PCIE connectors. I have many secondary PSU lying around which I will use to power Apollos once I decided where exactly they will live this winter.

Usage jumped up for at least 100W (according to Thermaltake app, which reads it directly from PSU, I even have USB cable which goes from PSU to motherboard USB pinout, to read all stats from it), but I didn't measure it at the wall.