Finland Opens Roihu Supercomputer, Tripling National Computing Capacity
Updated
Updated · HPCwire · Jun 29
Finland Opens Roihu Supercomputer, Tripling National Computing Capacity
3 articles · Updated · HPCwire · Jun 29
Summary
Roihu is now available to researchers across Finland after completing acceptance testing, moving the new national supercomputer into full deployment.
28 pilot projects ran on the system this spring, validating workloads before launch; Roihu is set to fully replace Mahti and Puhti by the end of summer 2026.
Top500 rankings published June 23 placed Roihu-G 91st and Roihu-C 193rd worldwide, while Green500 ranked the system 12th for energy efficiency.
Kajaani-based Roihu runs entirely on renewable hydropower and feeds excess heat into the district heating network, tying the capacity expansion to Finland's energy-efficiency goals.
Puhti will shut its computing services no earlier than July 31 and be donated in smaller units to 22 Finnish higher-education and research institutions, while Mahti's future transfer is still under negotiation.