800W Data Center Switch Cooling Solution: 0.042°C/W with 3D Vapor Chamber

Situation：Overcoming the 800W Thermal Barrier in 4U Core Switches

Network equipment manufacturers face a critical challenge when developing next-generation data center core switches: dissipating 800W of thermal power from a single Broadcom Tomahawk 5 chip within a compact 4U form factor. The requirement to achieve ultra-low thermal resistance below 0.045°C/W under 500CFM forced air cooling represented a near-limit performance demand for air cooling technology, necessitating a partnership with an advanced thermal solution provider.

Task：Delivering a Benchmark Cooling Module for Mass Production

As a professional thermal ODM partner, our mission was threefold:

1. Engineer a high-power-density cooling system that conforms to 4U specifications and stably supports 800W thermal load operation.

2. Achieve industry-leading thermal performance, with resistance ≤0.045°C/W under 500CFM airflow.

3. Deliver a mass-producible and highly reliable cooling module to accelerate our client's time-to-market.

Action：Integrated Technology Development from Simulation to Supply Chain

1.Core Technology Innovation & System Design

• Adopted a proprietary 3D Vapor Chamber Heatsink (TVC008) as the thermal foundation, optimizing its internal capillary structure specifically for the Tomahawk 5's heat flux profile.

• Developed an extended-fin cooling architecture to maximize heat exchange area, a key design innovation for high-efficiency air cooling.

• Executed system-level CFD simulation and airflow optimization to ensure thermal efficiency within the severely constrained space.

2.Rigorous Engineering Validation & Iteration

• Implemented multiple rounds of rapid prototyping, validated through wind tunnel testing and infrared thermal imaging analysis to refine temperature uniformity.

• Conducted comprehensive performance validation, including thermal resistance measurement, mechanical stress, and environmental reliability tests, ensuring compliance with stringent data center operational standards.

• Built a complete test database to inform data-driven design optimizations.

3. Manufacturing-Ready, Full-Process Execution

• Provided end-to-end thermal solutions, encompassing initial thermal design, DFM analysis, and mass production implementation.

• Coordinated supply chain resources to guarantee the stability and cost-effectiveness of batch production for the cooling modules.

• Assisted in system integration verification, ensuring flawless compatibility between our cooling module and the final switch system.

Result： Setting a New Air Cooling Benchmark for Data Centers

• Achieved breakthrough cooling performance: The solution reduced the chip operating temperature by 20°C, with thermal resistance stably controlled at 0.042°C/W, surpassing all targets.

• Successfully delivered the 3D Vapor Chamber Heatsink TVC008, which passed all verification tests and is fully qualified for mass production, directly supporting the client's next-generation switch launch.

• This project established a new industry benchmark for high-power switch air cooling and demonstrated our capability as a trusted, end-to-end thermal ODM partner capable of turning extreme thermal challenges into reliable, production-ready solutions.

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