For testing power consumption, we took our test system and plugged it into a Kill-A-Watt power meter. For idle numbers, we allowed the system to idle on the desktop for 15 minutes and took the reading. For load numbers we ran Battlefield 4 at 3840×2160 and recorded the average idle reading and the peak gaming reading on the power meter.
Power Consumption Results: With the XFX Radeon RX 470 4GB Black Edition video card installed in the system we topped out at 305 Watts when running BF4 at 4K resolutions and used 105 W at idle. Not bad performance numbers for AMD.