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The Energy & Sustainability Channel

Far beyond PUE: are today’s metrics adequate enough to measure your true environmental impact?

The term PUE is nearing its 16th birthday; first proposed by Microsoft’s Christian Belady and Chris Malone and promoted by the Green Grid, it has firmly established itself as the defacto metric for the measurement of energy efficiency in the data center.

Since 2006, the fight for sub 1.1 PUEs in addition to the elevation of carbon neutral status for data centers has led many to ask whether the metric is still fit for purpose. And, if not, how should it be replaced? Can ITUE better illustrate sustainability credentials? Or are other metrics capable such as CUE or WUE capable of driving carbon-free improvement?