High-performance computing company Bull has delivered Finland’s latest national supercomputer to the country’s IT Center for Science’s (CS) Kajaani data center.

Dubbed Roihu, the system will replace the center’s existing Mahti and Puhti machines, tripling the computing capacity of the center whilst also significantly increasing its AI performance.

Housed in the same data center as EuroHPC’s Lumi supercomputer, CSC said the Roihu will complement the existing system by “addressing national scale workloads and ensuring broad access for Finnish universities and research institutes.”

Based on Eviden’s BullSequana XH3000 hybrid platform, the supercomputer increases CSC’s GPU capacity by more than 10x, providing 49 petaflops of theoretical peak performance. Comprising 486 CPU nodes and 132 GPU nodes, each CPU node will have two 192-core AMD Turin 9965 CPUs, while the GPU nodes will be equipped with four Nvidia GH200 Grace Hopper superchips.

Roihu’s pilot testing will begin in April 2026, and it will be generally available in June 2026, CSC said.

”Roihu is a significant national investment that provides researchers with state-of-the-art computational capabilities,” said Finland’s Minister of Science and Culture, Mari-Leena Talvitie. “Looking ahead, strengthening interdisciplinary research and combining data across disciplines will be increasingly essential for generating new knowledge and deeper insights into the world around us. Supercomputers play a vital role in this effort, and Finland has made long-term investments in them.”

Bruno Lecointe, head of HPC, AI, and quantum computing at Bull, added: “Roihu reflects a long-standing collaboration with the Nordics region, where we have delivered numerous computing projects, and in particular with CSC, built on a shared commitment to reliable and sustainable computing for the research community. By supporting national supercomputing initiatives as well as AI and Giga factories across Europe, we aim to contribute to scientific excellence, advanced AI development, and strengthen Europe’s digital sovereignty.”