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 (both at the default and overclocked system settings).
Asus Sabertooth Z77 consumes a little more than average in nominal mode, although all of its processor power-saving technologies work absolutely correctly right from the start. The next diagram shows that enabling Asus’ proprietary power-saving technologies will provide additional energy-efficiency under any load as well as in idle mode.
In idle mode during overclocking the board’s power-consumption is again a little above average. Only under maximum load it becomes one of the most energy-efficient, but this is bitter-sweet victory, because this board has the lowest overclocking results of all, which was obtained without any increase in the CPU Vcore.