When benchmarking, the NAS device in question is connected directly to a Netgear GS108T v2 switch and the test PC is always our most high-end desktop using an SSD to read and write the data.
The WD MyCloud EX2 Ultra 8TB is lean when it comes to power consumption – we never saw our 8TB model consume more than 16 watts under load and 11 watts at idle.