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The design delivers nearly 4x the capacity of CoolIT’s previously demonstrated coldplate, extending the leadership of single-phase direct liquid cooling for multiple generations of AI infrastructure.
CoolIT Systems has announced the development of the first 15kW coldplate design. Delivering nearly four times the performance of earlier single-phase direct liquid cooling (DLC) coldplate designs, this breakthrough demonstrates that single-phase DLC can scale to meet the thermal demands of future ultra-high-density GPUs and AI accelerators.
CoolIT’s 15kW design delivers more than 10x the cooling capacity required for the current generation of AI GPUs and nearly 4x that of the then groundbreaking 4kW coldplate design the company announced in March 2025.
The 15kW coldplate uses CoolIT’s Split-Flow™ microchannel architecture and was validated with a standard water-glycol coolant at 1.2 L/min/kW, with system-level thermal performance suitable for 45°C warm-water cooling environments.
The announcement reinforces the continued momentum of single-phase DLC across the AI infrastructure ecosystem. NVIDIA has publicly highlighted single-phase DLC with 45°C supply temperatures as part of its next-generation AI platform direction, underscoring the importance of warm-water liquid cooling and advanced coldplate technologies in factory-integrated systems.
CoolIT is also advancing component coldplates and server architectures to extend the performance envelope of single-phase DLC. These efforts include cooling additional peripheral components to increase total heat capture, while developing coldplate designs capable of targeting the most intense hot spots within advanced AI chips.
“Single-phase DLC is already cooling millions of AI accelerators today. This achievement shows it is also the architecture to cool AI infrastructure well into the future,” said Kamal Mostafavi, CTO of CoolIT Systems. “With validated performance at 15kW, CoolIT has proven that single-phase DLC is not only practical to cool millions of the most advanced AI chips today – but ready to cool the coming generations of GPUs and AI accelerators.”
“AI accelerator innovation depends on cooling architectures that can keep pace with rising circuit density and packaging complexity,” said Dylan Patel, CEO of SemiAnalysis. “CoolIT’s work demonstrates that single-phase DLC has a clear path forward, giving both the semiconductor and data center industries greater confidence in the cooling architectures they can invest in.”
More information about the industry’s first 15kW coldplate design
CoolIT Systems Technical Brief: 15kW Coldplate