800V data center shift
Data centers are adopting 800V power distribution to cut copper use by about 45% and reduce AI workload costs roughly 30% — a hardware-level efficiency play pushing infrastructure, not just chips. (spectrum.ieee.org) GTC commentary also flagged a move to 45°C warm‑water inlet cooling as a major architectural shift for energy‑conscious AI operations. (delloro.com)
NVIDIA’s 800 VDC reference and Kyber/Rubin rack designs are positioned to enable megawatt-class IT racks, with the company and partners targeting initial deployments beginning in 2027. (developer.nvidia.com) Texas Instruments announced a complete 800 VDC power-architecture reference and demonstrations at GTC on March 16, 2026, while Infineon published an 800 V hot‑swap/SiC‑and‑GaN roadmap in October 2025 supporting NVIDIA’s reference design. (ti.com) A growing supplier coalition — including Navitas, STMicroelectronics, TI, Infineon, Eaton, ABB, Vertiv and Schneider Electric — has published prototypes and demos for 800 V DC components, converters and “side‑car” power modules to industrialize the stack. (powersemiconductorsweekly.com) Technical papers and vendor deep dives show the 800 V approach collapses multiple AC/DC/AC conversion stages into two-stage flows, boosts end‑to‑end delivery above 90% efficiency, and relies on wide‑bandgap GaN/SiC switches and solid‑state transformers for compact conversion. (szsanyi.com) NVIDIA’s Vera Rubin and MGX rack announcements specify 45°C warm‑water inlet operation for rack‑scale liquid cooling, and vendors are shipping facility CDUs and rack plumbing explicitly sized for that 45°C spec. (developer.nvidia.com) Market research and GTC commentary put hard numbers behind the shift: Dell’Oro documented a late‑2025 data‑center capex surge and framed GTC 2026 as an infrastructure pivot, while NVIDIA’s keynote projected roughly $1 trillion of AI infrastructure demand through 2027 — signals driving vendor roadmaps and hyperscaler capex. (datacenterfrontier.com)
