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)
1.52Uptime 2026 survey: respondent-mean annual PUE
1.36Uptime 2026 survey: capacity-weighted PUE