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: The AMD Radeon RX 480 in our test system used 112 Watts at idle and 324 Watts at peak 4K gaming. This is a welcome power savings from the R9 380X, but still a decent amount higher than the GeForce GTX 1070 and 1080.