800 VDC
Direct-current rack distribution for megawatt-class racks that cuts conversion stages and copper versus traditional AC.
Current numbers
~600 kWper Rubin Ultra Kyber rack (NVL144 = 144 packages / 576 dies) on 800 VDC
≈800 mAIllustrative 800 VDC / 1,000 Ω contact-current calculation; potentially fatal exposure, not an injury or arc prediction
~87% SST/800 VDC (analyst model) vs ~82% AC (guide fixture)Illustrative utility-to-VRM efficiency cases: SemiAnalysis May 2026 SST/800 VDC model versus the guide's assumed AC fixture