800 VDC is the likely endgame for datacenter power as AI racks hit 120–300+ kW
BenBajarin · x · 2026-09-16
Ben Bajarin points to his March deep-dive arguing that legacy AC/low-voltage power chains built for 10–20 kW racks can't serve 120–300+ kW AI racks. Delivering 120 kW at 48V needs 2,500A, driving oversized copper and wasted heat; 800V DC cuts current 16x and conversion losses. The structural question is how much rack density the electrical plant can absorb — and NVIDIA's platform roadmap will set the pace of the 800VDC transition.
More from Infra
- BofA: B200 and H100 GPU rental prices hit new highs, up 47% and 31% YTD — TheZachMueller · 2026-11-02
- vikhyat predicts alternating compute oversupply and undersupply on the road to AGI — TheZachMueller · 2026-11-02
- PyTorch Mac downloads hit 3.29M in October, up 20.5% MoM — LysandreJik · 2026-11-02
- CVSS 9.8 ingress-nginx flaw lets unauthenticated attackers get RCE and steal cluster Secrets — evilsocket · 2026-11-02
- RAM prices tripled, so Tesla cut a third of memory from Optimus's brain — aakashgupta · 2026-11-02
- Liquid AI's 1.7B LFM3 becomes first local model to nail live fixtures lookup on a MacBook — NielsRogge · 2026-11-02