Diamond-infused watercooling coldplates for 2,300W Nvidia Rubin drop temps by up to 22C
A bespoke coldplate for custom designed AI servers: Frore's LiquidJet Diamond.
Frore Systems has unveiled its innovative LiquidJet Diamond liquid-cooling coldplate series, designed to tackle the heat dissipation challenges of next-generation AI accelerators. This cutting-edge technology incorporates a diamond surface with a multi-stage 3D short-loop jet-channel microstructure, promising to reduce GPU temperatures by up to 22C compared to traditional cooling solutions.
The company claims that LiquidJet Diamond can effectively manage hotspots with power densities reaching 770 W/cm², marking a significant improvement over conventional coldplates. Such high heat dissipation capabilities could lead to a 35% enhancement in AI token throughput per watt, a critical metric for the efficiency of AI computations.
LiquidJet Diamond builds upon Frore’s existing LiquidJet coldplate technology and the specialized LiquidJet Nexus for Nvidia Blackwell and Rubin-based servers. However, unlike Nexus, which consists of multiple coldplates for several processors, LiquidJet Diamond is a standalone GPU coldplate, custom-made for individual use.
At the heart of LiquidJet Diamond’s innovation is an additional heat spreader attached to the bottom of the coldplate. This spreader contains diamond wafers placed directly above the GPU’s hotspots, facilitating more efficient heat distribution before it reaches the main cooling system. Diamond, with its thermal conductivity of over 20 W/cm·K, is far superior to copper’s approximately 4 W/cm·K.
While Frore has not disclosed the manufacturing process of these diamond wafers or the integration method, the company asserts that the diamond heat spreaders allow the coldplate to handle hotspots with power densities up to 770 W/cm², compared to the original LiquidJet's 600 W/cm² limit.
According to Frore, the LiquidJet Diamond solution can reduce GPU temperatures by 16C to 22C and boost AI token efficiency by 30% to 35%. The company also anticipates a 75% enhancement in heat-transfer efficiency and over 150% higher maximum hotspot power density than traditional cooling methods.
Frore plans to showcase LiquidJet Diamond at the OCP Global Summit from October 12 to 16, where they will demonstrate the coldplate's capabilities on Nvidia’s 2,300W Rubin accelerator, known for its extreme power draw of 770 W/cm². While the demonstration involves thermal testing rather than production GPUs, it underscores the technology's potential to revolutionize cooling solutions for high-performance AI systems.
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