From "Can Do" to "Do Well": The Manufacturing Battle Behind Rubin's Liquid Cooling Manifold

16 Manifolds, 576 Cold Plates and 95% Yield: The Six Gates That Separate Samples From Rubin-Scale Delivery

Vera Rubin's real supply-chain tension is its 100% liquid cooling, with the NVL72 rack packing 72 GPUs and 36 CPUs at 45°C inlet—Supermicro needs 16 vertical manifolds and 576 cold plates per rack—and GB/T 45287-2025 now demands at least 3.5MPa, 100,000 cycles and Ra ≤0.8μm for stainless steel manifolds. Karrie International delivered its first Vera Rubin products in September 2026 and entered mass production in fiscal Q2 2026/27; the real gates are yield above 95%, CPK consistency and capacity. AI chip liquid cooling penetration rises from 33% in 2025 to 53% in 2026 and near 60% in 2027. EXTRCOOL provides one-stop liquid cooling solutions."

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Area 51, NV, USA

EXTRCOOL INDUSTRY LIMITED

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The CDU, the Heart and Brain Liquid Cooling Cannot Do Without

Silent When Healthy, Fatal When Failing: The Five Selection Questions That Decide Whether the CDU Holds the Loop Together

The CDU plays the role the heart plays: it produces no cold, but without it the coolant never moves. Its heart role pumps and distributes via the manifold, while its brain role senses and controls. Selection answers five questions: total flow above all cold plate minimums, head above maximum loop resistance, exchanger capacity above peak load with fouling margin, redunda...

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