TUE can compare cooling choices when computational-component boundaries remain fixed
TUE = ITUE x PUEderived
| Value kind | derived — Derived values are guide calculations; their result is only as fixed as the stated inputs, scope, and method. |
|---|---|
| Scope | TUE = total facility energy / computational-component energy = PUE × ITUE. A matched useful-service energy comparison is another valid decision method; TUE is not uniquely boundary-stable and does not replace required PUE reporting. |
| As of | 2013 (ISC proceedings) |
| Source | Springer, Patterson et al., TUE, a New Energy-Efficiency Metric Applied at ORNL’s Jaguar, ISC 2013, pp. 372–382; publisher identifies 2013, not an exact publication day. · Abstract; citation and copyright identify ISC 2013. TUE/ITUE identity applied to a matched component boundary. |
| Derivation | Multiplying facility energy / IT energy by IT energy / computational-component energy cancels the IT boundary; both factors must share the same interval and component definition. |
| Review | checking…review by 2026-11-09 · standard cadence |
| Recorded changes | last 2026-09-16 · 2 revisions tracked |
| Claim id | the-only-boundary-stable-metric-for-comparing |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.