Japan’s first GPU servers with two-phase D2C
25th December 2025
JAPAN: Mitsubishi Heavy Industries have built and begun commercial use of graphics processing unit (GPU) servers cooled by two-phase direct-to-chip (D2C) cooling.
Said to be the first such system in Japan, the GPU is located at the data centre of the EXEO Group, a Japanese conglomerate in the construction and supply of telecommunications infrastructure, electrical, civil and environmental engineering services, systems solutions and integration services.
GPU servers are being increasingly used in data centres due to the spread of generative AI. The latest GPUs generate heat in the 1kW to 1.4kW range, making it difficult to achieve stable cooling.
Two-phase D2C dissipates heat by means of a cold plate applied directly on the GPU chip, through which liquid and gaseous coolant is circulated, resulting in a heat transfer rate that is an order of magnitude higher than conventional air cooling. The highly efficient heat removal with two-phase D2C also reduces the power usage of large fans inside the server.
The companies say that the combination of MHI’s heating and cooling technology with EXEO Group’s expertise in building and operating data centres has led to the realisation of a one-stop service for GPU servers.
