GPU Min Power Floor

Overview

GPU Min Power Floor (MPF), also called GPU power smoothing, is an NVIDIA hardware feature deployed on Blackwell (GB200) and subsequent GPU products that constrains power draw within a programmable band to prevent large-scale AI training data centers from creating grid-destabilizing power oscillations.

The feature has two components:

• Bounding box controller: Sets a power ceiling (enforced via standard power capping — frequency and voltage scaling) and a power floor (enforced by new hardware circuitry that actively burns energy to maintain a minimum power level). The floor is configurable from 20% to 90% TDP. The ceiling-and-floor combination forms a closed-loop hardware controller operating at fast time scales.
• Ramp rate controller: An outer loop on top of the bounding box that changes the ceiling and floor settings at a rate configured by the data center provider, enabling smooth ramp-up at workload start and ramp-down at workload end — meeting utility time-domain requirements.

With the feature deployed on Blackwell, AI training data centers achieve approximately 20% power swing at scale, versus near-100% oscillations without it. Most programmable knobs are available in-band for developers and out-of-band for cloud service providers. The feature carries a cumulative hardware lifetime tied to the frequency of power dips and the floor setting; NVIDIA provides lifetime counters for data center-level monitoring.