Liquid Cooling Becomes Core Driver for Next-gen High-density AI Data Center Construction

72 GPUs, 120kW, 10x Performance: How Liquid Cooling Made GB200 NVL72 the TCO Playbook

Liquid cooling has become the core driver for next-generation high-density AI data centers, where heat density exceeds 50 times standard offices and IT loads top 30MW. Despite the myth that it is new, liquid cooling dates to 1960s IBM mainframes; H100 racks cap at four air-cooled servers (41kW). The real driver is AI TCO optimization: GB200 NVL72's direct-to-chip cooling packs 72 GPUs into a 120kW rack with 10-fold Hopper performance. Liquid absorbs roughly 4,000 times more heat per unit volume, though around 15% of low-power components stay air-cooled. EXTRCOOL provides one-stop full 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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The Manifold That Decides Where the Coolant Goes

From CDU to Cold Plate and Back: How the Manifold's Flow Distribution, Not Total Flow, Decides Precision Cooling

Rising AI GPU power is moving liquid cooling from whether it can cool to cooling precisely, and the manifold decides whether coolant reaches every position as it should. It distributes coolant through main channels to parallel branches and collects the heated return, following CDU to supply manifold to cold plate to return manifold to CDU. Poor design lets near-end branc...

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How a Liquid Cooling Manifold Gets Made, from Material to Final Acceptance

316L to Helium Testing: The Four Links—Material, Machining, Cleanliness and Verification—That Decide Manifold Quality

Manifold manufacturing starts with material, and 316L is the safer default, with coolant compatibility outweighing thermal conductivity. CNC machining forms main channels, branches and interface holes, where holding channel positions matters more than drilling; one-piece machining avoids weld deformation, while tube and plate assemblies add laser, TIG or brazing. Deburri...

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