Datacentre energy efficiency: Is the time now for a big switch-off? The clock is ticking on sustainable IT and energy use, and much more can be done to save energy, power and reduce emissions at a datacentre level. So why isn’t it happening? Share this item with your network: By Published: 08 Jan 2021 Datacentres represent a growing share of global power consumption and emissions. An average user PC consumes 1.3 kWh of electricity every three hours, without even going online; transmitting a million static webpage requests per second has been estimated at another 11.610 kilowatts per hour (kWh) – or enough to power 13 US households for a month.