A lot of this is for cooling. https://en.wikipedia.org/wiki/Power_usage_effectiveness https://en.wikipedia.org/wiki/Power_usage_effectiveness https://www.nrel

A lot of this is for cooling. https://en.wikipedia.org/wiki/Power_usage_effectiveness https://en.wikipedia.org/wiki/Power_usage_effectiveness https://www.nrel.gov/computational-science/measuring-efficiency-pue.html https://www.nrel.gov/computational-science/measuring-efficie... > When the Energy Systems Integration Facility (ESIF) was conceived, NREL set an aggressive requirement that its data center achieve an annualized average power usage effectiveness (PUE) of 1.06 or better. Since the facility opened, this goal has been met every year—and the data center has now achieved an annualized PUE rating of 1.036. > Studies show a wide range of PUE values for data centers, but the overall average tends to be around 1.8. Data centers focusing on efficiency typically achieve PUE values of 1.2 or less. PUE is the ratio of the total amount of power used by a computer data center facility to the power delivered to computing equipment.