What is PUE? A Guide to Data Center Efficiency
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This article describes Power Usage Effectiveness (PUE), an industry metric for data center energy efficiency defined as Total Facility Power divided by IT Equipment Power, illustrates calculation with an example (1,000 kW total / 600 kW IT = PUE 1.66), and outlines operational measures to reduce PUE—such as airflow containment, raising inlet temperatures, free cooling, and upgrading UPS systems—while encouraging measurement and use of DCIM tools to track improvements.
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