We used a calibrated meter to measure the power at the wall. No monitors were factored into the readings. The system power drain was measured in the following states:
Idle: when resting at the desktop.
load: when primed with Cinebench R11.5 64 bit. Only the processor is stressed.
Gaming Load: running the ‘combined’ test in 3dMark 11. Processor and graphics card are stressed.
This system is very efficient, demanding around 250 watts when gaming, and 160 watts when the overclocked processor is tasked to 100% on all cores. When idle, the power consumption drops to 83 watts.