We frame the journey in 4 distinct phases >>

SemiAnalysis Twitter · SemiAnalysis (@SemiAnalysis_) · 2026-05-29

SemiAnalysis outlines a four-phase roadmap for data center power infrastructure, with row-level AC-DC rectification sidecars arriving in H2 2026 and centralized line rectification outside the white space planned for late 2028 to early 2029.

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AI Datacenter Power Grid Bottleneck and 800VDC Infrastructure Transition

Extraction

Topics: data-center-powerpower-infrastructureai-infrastructuredata-center-design

Claims

Data center power infrastructure evolution can be divided into four distinct phases.
Phases 1 and 2, beginning in H2 2026, are a retrofit approach using row-level sidecar units to handle AC-DC rectification adjacent to IT racks.
Phases 3 and 4, targeted for late 2028 to early 2029, remove rectification from the white space entirely and move it to centralized line infrastructure.

Key quotes

Phases 1 and 2 (starting H2 26) are the retrofit era. Row-level sidecars handle AC-DC rectification right next to the IT rack. In Phases 3 and 4 (late 2028 / early 2029) rectification moves out of the white space. Centralized line...