Hitachi develops GPU cold-plate prototype targeting lower cooling energy use

Hitachi has announced a prototype cold plate for GPUs designed to combine high heat-transfer performance with low pressure loss. The design routes coolant through thousands of parallel microchannels to the GPU heat-source area, while separating the warmed return flow from the incoming coolant to limit mixing.

In prototype testing at a coolant flow rate of 4 L/min, Hitachi reported thermal resistance of 0.011 K/W and pressure loss of 27.6 kPa. The company said the channel architecture is intended to achieve stronger cooling performance at the same cooling power than conventional structures.

Hitachi estimates, from annual modelling using temperature conditions in Tokyo and other typical cities, that the technology could cut by approximately 30% the cooling electricity required to discharge GPU heat outdoors. The estimate is linked to the use of higher-temperature liquid cooling and increased utilisation of outside air; it is not an operating result from a live data-center deployment.

The company intends to develop the cold-plate technology alongside integrated cooling management and equipment for HMAX Data Center. However, it has yet to evaluate the design on real equipment, with such testing planned only when an opportunity becomes available.

The development reflects a broader shift in AI data-center infrastructure towards GPU-level thermal efficiency, rather than server performance alone. If commercialised and validated in production racks and facilities, comparable cold-plate designs could support demand for high-temperature liquid loops, cooling-management systems and configurations that reduce chiller operation. The practical impact will depend on real-world validation.