To test power consumption, we monitor the overall power of the system through a plug-in electricity usage monitor at an idle and load state. This allows us to show the fluctuation between how much power draw the graphics card takes at idle and at load. By monitoring the overall usage of the whole system, it gives an easy comparison if you wish to do the same yourself as opposed to buying very expensive individual testing equipment.
Power draw is one of the many aspects that sets this system up as a rival to an Intel based Ultrabook. When running the system from the mains, the amount of power that it draws is very minimal and even at full load is less than that of a typical LCD monitor.