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 three games at 1920×1080 and averaged the peak results seen on the power meter.
Power Consumption Results: The PowerColor Devil HD7870 isn’t a power hog by any means and as you can tell the recommended 500W power supply should be more than enough for most gamers. When at an extended idle our test platform was just using 97 Watts of power and when gaming we had an average peak Wattage of 327. Not bad and just slightly lower than the three NVIDIA GeForce GTX 760 load numbers.