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Laser Welding Cooling Plates: Enabling High-Power GPU Cooling
2025-11-28260
Industry Challenges in the AI and HPC Era
Driven by the AI era and the surge of high-performance computing (HPC), the demand for GPU computing power in data centers has skyrocketed, accompanied by rapidly increasing power consumption. For example, certain GPUs under NVIDIA’s Blackwell architecture have thermal design power (TDP) exceeding 1,000 W. TrendForce estimates that the adoption rate of liquid cooling solutions for high-power GPUs will rise to 10%. Traditional air-cooling technologies are struggling to cope with such high-density, high-power environments. The industry urgently requires a cooling solution that is efficient, reliable, and scalable. For AI training clusters with extremely high rack density, cooling is not merely a device-level issue—it is critical to overall energy efficiency and operational costs.
Laser Welding: High-Performance Cooling Solutions
To address the cooling challenges posed by high-power, high-thermal-density GPUs, laser welding offers an effective solution for manufacturing cold plates. Laser welding provides ultra-high precision and focused energy, with minimal heat-affected zones (HAZ), reducing thermal deformation and damage when welding micro-channel cold plates. For complex copper or copper-copper laminated structures, laser welding achieves strong, leak-proof joints without compromising sealing, offering narrower and more stable welds with less thermal cycling damage compared to traditional brazing or TIG welding, thereby enhancing overall thermal conductivity.
Laser-welded cold plates ensure uniform fluid flow, minimize bubbles and dead zones, efficiently dissipate GPU heat, withstand high-pressure liquid circulation, and maintain stable temperatures during prolonged operation. This supports full-load operation of kilowatt-level TDP GPUs without throttling. The welding process is fast and precise, and cold plates undergo pressure and leak testing to ensure high reliability, significantly reducing the risk of liquid leakage and ensuring safe data center operation.
Although laser welding equipment requires higher initial investment, unit costs decrease significantly with production scale and process maturity. Liquid cooling improves GPU performance and lowers PUE, with industry analyses indicating potential PUE reductions to 1.05–1.10 and energy savings of approximately 30%, delivering substantial cost advantages for large-scale GPU clusters. Laser welding also offers excellent scalability, enabling high-precision manufacturing of both single-phase and future two-phase cold plates to meet the demands of higher-power, higher-density GPUs.
Future Outlook
As AI training scales continue to grow and single-GPU power consumption rises, liquid cooling will play an increasingly central role in data centers. Research predicts that by 2025, liquid cooling penetration will reach 15% in general-purpose servers and 50% in accelerated servers. High-performance cold plates manufactured via laser welding are expected to become the industry standard, supporting kilowatt-level GPU operation while reducing energy consumption and minimizing failure risks. Looking forward, developments may advance toward two-phase cold plates or even immersion cooling, with laser welding technology integrating seamlessly into these innovative structures, providing next-generation data centers with more efficient, reliable, and energy-saving thermal management solutions.
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