Rack Power Density Is Increasing Rapidly—And AC Architecture Can’t Keep Up

Rising rack-level power densities are straining existing AC-based distribution topologies and the challenges are increasing rapidly as rack level capacity surged to 120 kW and beyond (roadmaps suggesting 600 kW to 1 MW per rack within a few years). These power levels render traditional air cooling methods insufficient and impose thermal and electrical constraints on rack-level power conversion units and UPS systems.

Most current data center electrical systems rely on a 480V AC backbone, rectified at the rack into ~48V DC to serve downstream components. However, delivering megawatt-scale power at low voltage necessitates bulky conductors, exacerbating I²R losses and increasing physical infrastructure costs. As power densities rise, this architecture reaches diminishing returns.

High-voltage DC (e.g., 800V) provides a more scalable alternative. It minimizes resistive losses, reduces the volumetric footprint of conductors, and externalizes heat-generating conversions to centralized, easily cooled areas. With next-generation AI workloads requiring denser GPU co-location and faster interconnects, transitioning to HVDC for intra-facility power distribution becomes not only logical but inevitable.

Act now to stay ahead of the curve. Contact us today to learn how high-voltage DC can optimize your power distribution and drive the future of your AI data center's performance.

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Capacity Bottlenecks: Why the Grid Can’t Keep Up with Data Center Demand

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Why DC Architectures Make Sense for the Next Generation of Data Centers