TUE (total-power usage effectiveness): definition

Beginner

A score for the whole site: how much electricity the building uses for each unit that reaches the chips.

Novice

PUE multiplied by ITUE: total facility energy divided by the energy used by the computing parts. Because fans and power losses count no matter whether they sit in the building or the server, it can fairly compare designs that move them across that line.

Expert

$\mathrm{TUE} = \mathrm{ITUE} \times \mathrm{PUE} = \text{total energy} \div \text{compute energy}$ . It removes PUE’s incentive to shift cooling and conversion into the IT box, but inherits PUE’s blind spots (no measure of useful work) and is sensitive to temperature set points.