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LUMI supercomputer

LUMI is the fastest supercomputer in Europe and third fastest globally (the Top500 list published in November 2022). LUMI is also the seventh greenest supercomputer on the planet (the Green500 list published in November 2022).

LUMI has a sustained computing power of 375 petaflops (HPL, High-Performance Linpack) in its final configuration. The theoretical computing power is more than  550 petaflops which means 550 quintillion calculations per second.  LUMI is also one of the world’s leading platforms for artificial intelligence.

LUMI facts:

LUMI’s sustained computing power (HPL) is 375 petaflops in its final configuration which equals a theoretical computing power of more than 550 petaflops.
LUMI’s computing power is equivalent to the combined performance of 1.5 million of the latest laptop computers. These would form over 23-kilometer high tower.


In total, LUMI has an astounding storage of 118 petabytes and an impressive aggregated I/O bandwidth of 2 terabytes per second.
LUMI is using 100% hydropowered energy. Up to 200MWs are available. The waste heat of LUMI is producing 20 percent of the district heat of the area.


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.