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Next-Gen Thermal Engineering: Liquid Cold Plate Design for AI High-Density Compute

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2026-08-27

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Next-Gen Thermal Engineering: Liquid Cold Plate Design for AI High-Density Compute

With rapidly rising AI computing loads and soaring chip TDPs, traditional air cooling can no longer sustain stable thermal performance for high-density GPU clusters. Direct-to-Chip (D2C) liquid cooling has become the mainstream solution for next-generation data centers. This article breaks down the optimized liquid cold plate architecture engineered for the NVIDIA Vera Rubin VR200 platform.

1. Precision Micro-Channel Base Plate Structure

The core thermal transfer area adopts precision skiving technology to form dense micro-channels ranging from 100 μm to 300 μm. This microstructure greatly expands the heat exchange area and significantly improves liquid cooling heat transfer efficiency for high-power chips.

The full manufacturing workflow includes CNC milling, precision skiving, vacuum brazing, chemical cleaning, and electroless nickel plating. Every finished cold plate undergoes 100% helium leak testing and hydrostatic pressure testing to ensure zero-leak stability for long-term data center operation.

2. Oxygen-Free Copper Top Cover & Hermetic Bonding

The cold plate top cover is made of high-purity oxygen-free copper (OF-Cu) with electroless nickel plating on the exterior, delivering excellent thermal conductivity and reliable oxidation resistance.

Different from conventional glue bonding processes, the entire structure adopts full vacuum brazing hermetic integration. This bonding method avoids aging and delamination risks under continuous thermal cycling, ensuring long-term structural reliability. Ultrasonic precision cleaning after brazing removes all residual solder and metal debris to maintain internal fluid cleanliness.

3. All-Metal 316L Corrugated Hose Design

To solve aging, permeation and contamination issues caused by traditional EPDM rubber hoses, this cooling solution adopts mirror-finished 316L stainless steel corrugated hoses. The rubber-free architecture eliminates medium permeation and material aging risks, suitable for 7×24-hour continuous operation in high-end AI computing scenarios.

4. Integrated Manifold & Anti-Galvanic Corrosion System

The fluid distribution and collection manifold adopts custom 316L stainless steel structure. By unifying the material of manifolds and hoses and isolating copper-stainless steel direct contact in key fluid channels, the design effectively avoids electrochemical galvanic corrosion, greatly improving the long-term durability of the liquid cooling loop.

Conclusion

High-density AI computing puts forward extremely strict requirements on cooling efficiency, structural stability and anti-leakage performance. Through micro-channel precision processing, vacuum brazing hermetic technology, all-metal pipeline design and anti-corrosion optimization, the upgraded VR200 liquid cold plate architecture provides a more reliable and efficient thermal management solution for next-generation AI data center clusters.