The Green Grid, a leader in energy efficiency standards for data centers, has recently updated their PUE (Power Usage Effectiveness) metric that they came out with in 2007 and have outlined the new benchmarks in a white paper titled, “Recommendations for Measuring and Reporting Overall Data Center Efficiency“.

PUE is defined by the total data center energy consumption or power divided by the IT energy consumption or power. So, the lower the resulting variable, the higher the energy efficiency of the data center because more of the total energy is being used for its intended function – to power the IT equipment – rather than to cool the servers, provide lighting, support infrastructure, etc.

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