CoolIT Systems has developed what it says is the first 15kW coldplate design, a breakthrough the Calgary-based liquid cooling company says demonstrates that single-phase direct liquid cooling can scale to meet the demands of future ultra-high-density GPUs and AI accelerators.
The company said the new design delivers nearly four times the performance of earlier single-phase direct liquid cooling coldplate designs. It also provides more than 10 times the cooling capacity required for the current generation of AI GPUs and nearly four times the capacity of the 4kW coldplate design CoolIT announced in March 2025.
“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.”
CoolIT’s 15kW coldplate uses the company’s Split-Flow microchannel architecture and was validated with a standard water-glycol coolant at 1.2 L/min/kW. The company said the design delivers system-level thermal performance suitable for 45°C warm-water cooling environments.
The announcement comes as demand for AI infrastructure continues to push data centre cooling requirements higher, with rising circuit density and packaging complexity creating new thermal challenges for chipmakers, server manufacturers, cloud providers and data centre operators.
“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.”
CoolIT said the achievement reinforces momentum for single-phase direct liquid cooling across the AI infrastructure ecosystem. The company noted that NVIDIA has publicly highlighted single-phase DLC with 45°C supply temperatures as part of its next-generation AI platform direction, pointing to the growing importance of warm-water liquid cooling and advanced coldplate technologies in factory-integrated systems.
The company is also advancing component coldplates and server architectures to extend the performance envelope of single-phase DLC. That includes 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.
CoolIT designs, manufactures and services liquid-cooling hardware for global server, cloud service provider and data centre markets. Its single-phase direct liquid-cooling technology is used in high-density, high-efficiency computing environments and advanced AI infrastructure.
According to the company, CoolIT’s DLC systems are used in seven of the top 10 supercomputers and many hyperscale cloud service provider sites. In 2026, Data Center Magazine named CoolIT the number one direct-to-chip cooling company and among the top three cooling companies worldwide.