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 1.9.1 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 difference in power between the GeForce GTX 560 Ti, GTX 560-Ti 448 Core and the GTX 570 is very small. This actually was a bit shocking to us, but the numbers were solid and triple checked. The AMD Radeon HD 6950 used the least amount of power when running Furmark at 640×480 and HAWX 2 at 1920×1080! The Intel X79 platform with the MSI N560GTX-448 Twin Frozr III Power Edition video card in it hit 320 Watts in the game title and 391 Watts in Furmark.