The Definitive Guide toAI Data Centers
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PUE · Power Usage Effectiveness

Total facility power divided by IT power; the headline efficiency ratio where 1.0 is perfect and AI halls target ~1.1-1.2.

Total facility power divided by IT power; the headline data-center efficiency ratio, lower is better.

Also written as: Power Usage Effectiveness

Current numbers

≥500 kWEU EED data-center reporting threshold (~31 data points incl. PUE/WUE/ERF/REF; due 15 May annually)as of 2026-08-24 · register ↗
1.52Uptime 2026 survey: respondent-mean annual PUEas of 2026-08 · register ↗
1.36Uptime 2026 survey: capacity-weighted PUEas of 2026-08 · register ↗

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