The Definitive Guide toAI Data Centers
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OCP · Open Compute Project

An industry community that open-sources data-center hardware designs for racks, power, cooling and security.

Current numbers

v0.7.0OCP Diablo 400 (Mt. Diablo) sidecar-power spec; ±400/800 VDC, ~100 kW to ~1 MW racksas of March 1, 2026 · register ↗
v0.7.0OCP Diablo 400 rack & power base spec edition (v0.7.0, effective 2026-03-01; was v0.5.2 2025-05-30); the ±400/800 VDC sidecar-power transition for >150 kW racksas of March 1, 2026 · register ↗
May 2026MRC released as an open OCP spec (OpenAI + AMD/Broadcom/Intel/Microsoft/NVIDIA): RoCEv2 extension with per-packet spray, SACK, optional trimming, PFC-off; production-proven at 50k–75k-GPU scale before publicationas of 2026-05 · register ↗

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