Load power consumption was recorded by fully loading the system running LinX and MSI Kombustor simultaneously. The maximum power usage recorded was then assigned to the load power consumption, while the minimum recorded without loading the system was assigned to the idle consumption.
Gigabyte have strongly advertised their Ultra Durable 3 innovation with their all their latest motherboards and their claim is that with 2oz of copper in the PCB, power consumption can be made more efficient. Comparing it against the ASUS P6X58D-E, we can immediately see that their words hold true. At stock speed, it consumes over 30W less than its ASUS counterpart and at 4GHz, it consumes 10W less under load. At idle, power consumption is also very reasonable and Dynamic Energy Saver 2 contributes to this. Compared to the ROG motherboards, the Gigabyte isn't as favourable but we have to remember that they also cost a lot more.