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What is Power Usage Effectiveness (PUE) and how is it Calculated?

Posted on October 13, 2014 by Jeanne Ziobro

Raritan PUE Power Usage Effectiveness Total Facility Power

The Power Usage Effectiveness (PUE) metric which was first introduced by The Green Grid™ in 2007 has become the de facto standard for measuring data center efficiency.  But despite its prevalence, many data center operators are unclear on what PUE is, how it is calculated, and how it can be used to further energy efficiency initiatives. For instance, many data center managers know that their PUE readings should be as close to the number one as possible, but why?


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