At maximum brightness, the ASUS MX34VQ is one of the more economic models when it comes to power usage – we find it in fourth place. However, it is fairer to compare at the same brightness. For this we have less comparison material, but the MX34VQ still performs great: not even 35 watt for a monitor of this size is excellent. Unfortunately the power consumption in standby is slightly high, which undoubtedly is because of the integrated charger, which remains active. If we turn the monitor off completely the power consumption is extremely low (although still measurable).