The Definitive Guide toAI Data Centers
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OCP Open Data Center baseline cluster size

12 MW minimum; 24 MW preferredrecommendation

Value kindrecommendation — Recommendations are design guidance, not measured facts; validate them against the project boundary conditions.
ScopeCluster Size Baseline in the specification's power table. The specification also requires at least four power blocks per data hall.
CaveatDesign targets for 2027–2028 AI/ML systems in a voluntary multi-vendor specification (AMD, Google, Meta, NVIDIA); not measured or shipping racks.
As of2026-08-27
SourceOpen Compute Project, Open Data Center: Next-Generation ML Infrastructure Design Principles, rev 0.7.0, effective 2026-08-27 · §5.1 Table 2, p. 8
Reviewchecking…review by 2027-04-30 · standard cadence
Recorded changeslast 2026-10-15
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