PSU · Power Supply Unit
The component that converts incoming AC or DC into the regulated voltages a server or GPU node consumes.
Current numbers
<5% THDcurrent distortion of a modern AFE/active-PFC AI server PSU by design (vs 30%+ for 6-pulse)
65 J/GPUenergy storage integrated in GB300 NVL72 power shelves; ~half the PSU volume is capacitance
<2 msORV3 BBU ramp to full power on 48.5 V busbar droop; busbar held ≥46 V; PSU ≥97.5% (30–100% load)