Independent third-party benchmarking has confirmed that Accelsius’s two-phase, direct-to-chip liquid cooling technology significantly outperforms standard single-phase systems. Testing conducted on an eight-way NVIDIA B200 GPU server shows that Accelsius's NeuCool technology maintains superior thermal management even as facility water temperatures rise. This development is critical for operators aiming to achieve global free cooling and maximize energy efficiency in high-performance AI infrastructure.
Benchmarking NeuCool Performance on NVIDIA B200
The independent evaluation utilized a third-party systems integrator to test approximately 40,000 operating points under simulated AI workloads. By varying the power consumption of the GPU core, CPU, and high-bandwidth memory (HBM), researchers created a comprehensive thermal comparison. The results demonstrate that Accelsius can match the performance of single-phase cooling at 45°C facility water using inlet temperatures as high as 54°C. Furthermore, increasing facility water flow from 1.5 LPM/kW to 3.0 LPM/kW widened the thermal advantage of two-phase cooling over single-phase from 9°C to 14°C. This capability allows for facility water supply temperatures of up to 59°C, a threshold previously unattainable with single-phase technology. This validates the physics of vaporization in delivering disproportionate benefits as facility water temperatures increase.
Enabling Global Free Cooling for AI Factories
As AI infrastructure expands into hotter climates, the ability to operate with warmer facility water temperatures becomes a critical requirement for purpose-built AI factories. Every 1°C increase in facility water temperature correlates to approximately 4 percent in annual energy savings. By enabling operation at temperatures exceeding 50°C, Accelsius's NeuCool technology supports NVIDIA’s objective of enabling global free cooling. This allows data center operators to reduce energy consumption and local community impact by utilizing warmer water for much of the year.
Key Takeaways
- Accelsius NeuCool matches single-phase performance at 45°C with 54°C inlet water temperatures.
- Increasing water flow from 1.5 to 3.0 LPM/kW expands the thermal advantage over single-phase from 9°C to 14°C.
- Every 1°C increase in facility water temperature provides approximately 4 percent in annual energy savings.
TechInsyte's Take
In our view, these benchmarks signal a pivotal shift in how AI infrastructure must be designed for thermal efficiency. As NVIDIA pushes for warmer facility water to enable global free cooling, the limitations of single-phase cooling become a bottleneck for scaling. Accelsius's ability to maintain performance at 54°C suggests that two-phase technology is not just an incremental upgrade, but a fundamental requirement for operators seeking to optimize energy savings in warmer climates. This validates the strategic move toward two-phase systems for next-generation AI deployments.
Source: https://www.businesswire.com/
