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LUMI supercomputer

LUMI is the fastest supercomputer in Europe and the fifth fastest globally (the Top500 list published in May 2024). LUMI is also the twelfth greenest supercomputer on the planet (the Green500 list published in May 2024).

LUMI, an HPE Cray EX system, has a sustained computing power of 380 petaflops (HPL, High-Performance Linpack) in its final configuration. LUMI is also one of the world’s leading platforms for artificial intelligence.

LUMI facts:

 LUMI’s sustained computing power (HPL) is 380 petaflops (sustained performance) in its final configuration.
LUMI’s computing power is equivalent to the combined performance of 1.5 million of the latest laptop computers. These would form over a 23-kilometer-high tower.


LUMI is using 100% hydro-powered energy. LUMI’s waste heat is used to heat hundreds of households in the city of Kajaani.


Used technologies: The supercomputer achieves its high performance with a large number of nodes with accelerators (GPUs). In addition, the system is complemented by a CPU-only partition, IaaS cloud services, and a large object storage solution.

Read also a blog post about the system architecture: May we introduce LUMI and the news about the system architecture.

A description of the LUMI system architecture and the different hardware partitions on LUMI docs.

Visit the LUMI data center virtually!