To test power consumption today we are using a Kill A Watt power meter. We loaded the system with some games and measured results at both full load and idle.
The efficiency of the Asus motherboard is fantastic, only demanding 30 watts at idle and 42 watts under load. This could be left on 24/7 without risk of causing an issue with your electricity bill. As in the previous reviews, you don't need a high output power supply, but we used this unit for the second part of our article which will feature discrete graphics solutions.