Eviden Inaugurates JUPITER, Europe’s Most Powerful Supercomputer

Eviden, the Atos Group product brand specializing in advanced computing, cybersecurity, mission-critical systems, and vision AI, has officially inaugurated JUPITER, Europe’s most powerful supercomputer. The inauguration of JUPITER represents a milestone for Europe’s scientific and technological landscape.

Already ranked as Europe’s most powerful HPC and AI system – and the fourth worldwide – the system is poised to become the first on the continent to cross the exascale threshold, capable of executing more than one quintillion calculations per second. This computing power is comparable to the combined output of ten million modern desktop PCs.

The ceremony took place on September 5, 2025, at the Jülich Supercomputing Centre in Germany, and was attended by senior political leaders, including German Chancellor Friedrich Merz, North Rhine-Westphalia’s Minister-President Hendrik Wüst, Federal Research, Technology and Space Minister Dorothee Bär, and Ina Brandes, Minister of Culture and Science of North Rhine-Westphalia.

The project was procured by the EuroHPC Joint Undertaking (JU) and is hosted at Jülich, one of Europe’s most established supercomputing research centers. JUPITER is built on Eviden’s modular data center concept, which allows for scalable, pre-engineered components to be integrated into a single high-performance infrastructure. The booster partition, designed and delivered by Eviden, is powered by 24,000 NVIDIA GH200 Grace Hopper Superchips connected via NVIDIA Quantum-2 InfiniBand technology, a configuration optimized for highly parallel workloads such as AI training and complex simulations.

Energy efficiency has been a central design priority. Eviden incorporated its patented Direct Liquid Cooling technology, which has already positioned JUPITER’s JEDI module at the top of the June 2025 Green500 ranking, a benchmark for the most energy-efficient supercomputers globally. This focus on sustainability addresses both environmental concerns and the operational challenges of running systems at exascale capacity.

AI, Climate Research, Neuroscience

The scientific and industrial implications are extensive. For climate research, JUPITER will enable the ICON atmospheric model to run at resolutions that were previously unattainable, providing more accurate predictions of extreme weather and long-term climate trends. In neuroscience, the system will allow researchers to simulate neural networks at the level of individual cells using platforms like Arbor, offering new insights into memory, learning, and neurodegenerative diseases such as Alzheimer’s.

Artificial intelligence is another key area of focus. JUPITER’s performance is expected to accelerate the training of large language models, including initiatives such as OpenGPT-X, a multilingual model designed with a particular focus on German. Faster training cycles will support advances in generative AI, with applications spanning scientific discovery, industrial design, and media production.

For European policymakers, JUPITER is more than a technological showcase; it is a strategic asset that enhances the region’s digital sovereignty. By combining extreme-scale compute power with sovereign data management and energy efficiency, the supercomputer positions Europe to compete with the United States and Asia in the global race for AI and HPC leadership.

“The scale of JUPITER is transformative,” said Eviden executives during the launch. “This system empowers researchers and industries across Europe to accelerate innovation while meeting the highest standards of sustainability and sovereignty.”

The supercomputer is expected to become fully available to European researchers, public bodies, and industrial partners in the coming months, marking the beginning of a new era in scientific computing for the continent. JUPITER’s commissioning underscores Europe’s commitment to building the infrastructure required to meet the twin challenges of technological competitiveness and climate sustainability.