Fig 1AI rack · PUEMove or tap to set the load8/8 online · IT 40 kW · PUE 1.35
PUE needle: total power ÷ IT power8 GPU servers, 5 kW eachCold-aisle floor: airflow follows the loadPUE = total facility power ÷ IT equipment power. Part of the cooling and power-distribution losses is a fixed overhead, so the lower the load, the higher the PUE. At full load this illustrative model reaches a PUE of 1.35, matching the operating value of the Kexin Cloud Data Center. The three bars on the front of the metering box show, top to bottom, IT, cooling and losses. (Illustrative model: cooling = 3 kW + 20% × IT, losses = 1 kW + 5% × IT.)