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 measured the peak wattage used by the system while running
the OpenGL benchmark FurMark 1.9.2 at 640×480 resolution. We also ran the game HAWX 2 and looped the benchmark three times and recorded the highest Wattage seen on the meter.
Power Consumption Results: The AMD Radeon HD 7700 series does exceptionally well when it comes to power efficiency. AMD put a ton of engineering work into PowerTune and ZeroCore power technologies on the new core architecture and the fruits of their labor are really starting to show it. The AMD Radeon HD 7000 series has impressive power numbers and you can see what AMD claims below.
|Maximum Board Power||Typical Board Power||Long Idle Power|
|Radeon HD 7970||250W||~230W||<3W|
|Radeon HD 7950||200W||~180W||<3W|
|Radeon HD 7770||100W||~80W||<3W|
|Radeon HD 7750||75W||~55W||<3W|