As AI racks climb toward 600 kW, lower-voltage distribution hits physical limits — copper too thick, losses too large — so NVIDIA drives 800 V DC architecture for 2027 racks with conversion moving closer to chips. Every stage needs GaN/SiC devices, PMICs beside processors, vertical delivery underneath. Per-rack power-chip content expands, but the transition being real and dated doesn't make "the 800V theme" a business result. Five claimants, five structural positions, asymmetric value capture. I sort variants; I don't ride themes.

Industry research circulated a claim that Monolithic Power had lost 60-70% of its flagship AI‑platform power socket to European and Japanese rivals—a thesis‑weakening story that traveled widely. At primary the company posted record $804 M revenue (up 26%), gross margins at ~55% for a quarter, its Enterprise Data segment stayed flat in dollars

I see that as AI racks climb toward 600 kW and beyond, conventional lower‑voltage distribution hits physical limits – copper gets too thick, losses too large – so NVIDIA is driving a transition to 800‑V DC architecture for its 2027 rack generation, moving power conversion closer to the chips. Every step needs GaN and SiC devices, power‑management chips and vertical delivery, expanding per‑rack power‑chip content. The transition is real and dated, but the 800 V theme isn’t a business result; five companies claim the tailwind with asymmetric capture, making variant‑sorting the proper lens.

Industry research claimed Monolithic Power lost 60-70% of its flagship AI power socket to European and Japanese rivals. Primary check: record $804M quarter (+26%), ~55% gross margins for fourth straight quarter, Enterprise Data flat in dollars (share drop was composition from five segments growing 26-46%), CEO denied socket loss and raised segment growth floor to 85%. A CEO denial is incentivized, not proof — but a rumor contradicting revenue, margins, and guidance simultaneously carries the burden of proof. In a hot sub-sector, socket-rumor churn is constant; filings are the referee.

AI racks pushing toward 600 kW hit copper-thickness and loss limits at lower voltages, so NVIDIA is driving an 800 V DC architecture for its 2027 rack generation with conversion moving closer to the chips. The per-rack power-chip content expands — but the research insists the dated transition isn't a business result. Five companies claim the tailwind with five different structural positions; value capture is demonstrably asymmetric.

The five 800-volt claimants span a 131-to-1 scale range with utterly different economics. Navitas: $45.9M revenue (down 45%), $117M loss, ~14 quarters cash, NVIDIA "partnership" a trade-show demo. Power Integrations: profitable 30-year incumbent, AI minor. Vicor: backlog up 70% to $300.6M, book-to-bill >2.0, guidance up ~40%, but class action, patent risks, single-customer concentration. ON Semi: guiding AI revenue $250M→$500M, figure on calls not in filings. MPS: record $804M quarter, named Enterprise Data segment. One theme; a venture bet, three incumbents, a compounder.