WORLDSUPERCOMPUTING

WORLD SUPERCOMPUTING

Facility Planner

Keep installed capacity, average electrical load and energy separate.

Power and period assumptions
Average IT power as a share of installed IT capacity; not CPU or GPU utilization.

The per-rack figure must include all IT equipment within the chosen boundary. Load factor is an explicit simplifying assumption. Real sites draw idle power.

The arithmetic

Installed IT kW = racks × kW per rack. Average IT kW = installed IT kW × load factor. Average facility kW = average IT kW × PUE. Period kWh = average facility kW × days × 24. Facility overhead = facility energy − IT energy.

PUE already includes facility overhead. Do not add cooling energy a second time. This is period-energy arithmetic, not a cooling design, utility quote or site-capacity approval.

PRIMARY SOURCES · CHECKED 9 NOVEMBER 2026

LBNL-hosted Green Grid: PUE examination →2012, version 6 · PUE = total facility energy / IT energy within the same boundary and period. Does not measure useful scientific output.

LBNL: data-centre assessment tools →Checked 2026-11-09 · Early-stage profiling tools support assessment, not an investment-grade design or site survey.