Roihu, Finland’s newest supercomputer, was officially inaugurated at the LUMI data center in Kajaani, Finland.
CSC General Manager Kimmo Koski described Roihu as a supercomputer designed to serve the needs of Finnish researchers, while ensuring that research data can be securely stored and managed within Finland.
“Bringing computing and data together in this way is still rare internationally. Finland’s centralized model creates strong synergies enables us to build an ecosystem that delivers tangible societal impact,” said Kimmo Koski. “We need to boost growth and security, and digital infrastructures have a key role to play. Growth must come from innovation that increases productivity and strengthens skills. High performance computing has significant potential in both."
"The value of the data economy in EU member states is expected to grow around €500 billion to nearly €1 trillion between 2023 and 2030", Koski continued. "Finland’s data economy is among the fastest growing in Europe. Creating value from data requires both technological expertise and a deep understanding of the field where it is applied."
Tripling the Finnish computing capacity
Minister of Science and Culture Mari‑Leena Talvitie: "Finland has done major investments in European supercomputers such as LUMI supercomputer and LUMI AI Factory. However, these efforts to strengthen the computing capabilities in Europe don’t eliminate the need for national supercomputer, tailored specifically for Finnish research and innovations.”
“Together, Roihu and LUMI ecosystem, located here in Kajaani, form a unique environment for Finnish research and innovations. It meets the needs of researchers and companies and enables to tackle projects of different scales,” Mari-Leena Talvitie continued. “Roihu triples our national computing capacity and ensures Finnish research remains internationally competitive.”
During the DL2026 program, CSC’s compute and storage resources are renewed in 2026, with the Roihu supercomputer forming the cornerstone of the new environment. In addition, the storage capacity of Allas is significantly increased and Pouta cloud services CPU and GPU capacity is expanded.
No end in sight
The increased capacity is essential for CSC’s rapidly growing user base. During the era of Mahti and Puhti, CSC’s former national supercomputers, the number of users tripled. In 2025, Puhti had 4,320 users and Mahti 1,577.
CSC’s Director of Advanced Computing Infrastructure Pekka Lehtovuori: "There is no end in sight: AI, data and digitalization will continue to fuel growth in the coming years.”
New features are also on the way. A secure tenant on Roihu platform will be integrated with CSC’s secure data management service, enabling high-performance computing with sensitive data toward the end of 2026. Furthermore, Roihu will be connected to Finnish quantum computers from 2027 onwards.
