We performed our power consumption measurements using an Extech Power Analyzer 380803. This device is connected before the PSU and measures the power draw of the entire system (without the monitor), including the power loss that occurs in the PSU itself. In the idle mode we start the system up and wait until it stops accessing the hard disk. Then we use LinX to load the CPU. For a more illustrative picture there are graphs that show how the computer power consumption grows up depending on the number of active execution threads in LinX.
In nominal mode Micro-Star mainboard is just as good as other testing participants and the power consumption readings remain on the same level in idle mode. However, things change drastically during overclocking, because MSI boards, unlike everyone else, can’t keep power-saving technologies intact, which immediately affects the power consumption rates.
In this case we can disregard the results of Foxconn P67A-S, because we didn’t increase the processor core voltage during overclocking. So, its low power consumption comes at a price: the lowest performance. However, all other mainboards in idle mode consume 71-76 W, while MSI boards – 87 W. Under low operational load tested mainboards consume 116-122 W, while MSI board – all 132 W. It could have become the most power-hungry in case of maximum CPU utilization, but Asus mainboard took over the lead in this aspect. I have to admit that these are very disappointing results, which mean that it makes no sense to use MSI mainboards for overclocking, because they happen to waste a lot of power.