What are Europe’s fastest supercomputers in 2025?

What are Europe’s fastest supercomputers in 2025? - Portugal Business News

Tech News Europe – Here is the list of Europe’s Top 10 fastest supercomputers in 2025 and what is the world’s No. 1 fastest supercomputer in 2025, according to the TOP500 List dated June 2025:

1 - List of Europe’s Top 10 fastest supercomputers in 2025:

1 - JUPITER Booster supercomputer – Germany

Europe’s No. 1 fastest supercomputer in 2025 is the JUPITER Booster supercomputer from Germany, with 4,801,344 cores and a peak theoretical performance of 930.00 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

Germany’s JUPITER Booster ranks fourth fastest supercomputer globally. JUPITER is located at the Forschungszentrum Jülich campus in Germany and operated by the Jülich Supercomputing Centre.

Up to now, the EuroHPC JU has procured ten state-of-the-art supercomputers, located across Europe, including JUPITER that is located at the Forschungszentrum Jülich campus in Germany and operated by the Jülich Supercomputing Centre. Soon to be capable of delivering 1 ExaFLOP of computing power, JUPITER will become Europe’s first Exascale supercomputer.

The manufacturer of Europe's fastest supercomputer, the JUPITER Booster supercomputer, is EVIDEN. It is based on Eviden’s BullSequana XH3000 direct liquid cooled architecture.

2 - HPC6 supercomputer - Italy

Europe’s 2nd fastest supercomputer in 2025 is the HPC6 supercomputer from Italy, with 3,143,520 cores and a peak theoretical performance of 606.97 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

The manufacturer of the HPC6 supercomputer is Fujitsu.

3 – Alps supercomputer – Switzerland

Europe’s 3rd fastest supercomputer in 2025 is the Alps supercomputer from Switzerland, with 2,121,600 cores and a peak theoretical performance of 574.84 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

The manufacturer of the Alps supercomputer is HPE.

4 – LUMI supercomputer – Finland

Europe’s 4th fastest supercomputer in 2025 is the LUMI supercomputer from Finland, with 2,752,704 cores and a peak theoretical performance of 539.13 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

LUMI is hosted by the CSC – IT Center for Science in Finland.

The manufacturer of the LUMI supercomputer is HPE - Hewlett Packard Enterprise.

5 – Leonardo supercomputer – Italy

Europe’s 5th fastest supercomputer in 2025 is the Leonardo supercomputer from Italy, with 1,824,768 cores and a peak theoretical performance of 315.74 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

Leonardo is a pre-exascale EuroHPC supercomputer located in the Bologna Technopole, Italy. It is supplied by ATOS, based on a BullSequana XH2000 supercomputer and hosted by CINECA.

The manufacturer of the Leonardo supercomputer is EVIDEN.

6 - Isambard-AI phase 2 supercomputer – United Kingdom

 

Europe’s 6th fastest supercomputer in 2025 is the Isambard-AI phase 2 supercomputer from the UK, with 1,028,160 cores and a peak theoretical performance of 278.58 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

Isambard-AI, hosted at the University of Bristol, officially went live in July 2025. The supercomputer was built by Hewlett-Packard Enterprises (HPE) using its Cray EX architecture and fitted with over 5400 NVIDIA Grace Hopper superchips.

The manufacturer of the Isambard-AI phase 2 supercomputer is HPE.

7 - ISEG2 supercomputer – Netherlands

Europe’s 7th fastest supercomputer in 2025 is the ISEG2 supercomputer from the Netherlands, with 718,848        cores and a peak theoretical performance of 338.49 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

The manufacturer of the ISEG2 supercomputer is NEBIUS.

8 - MareNostrum 5 ACC supercomputer – Spain

 

Europe’s 8th fastest supercomputer in 2025 is the MareNostrum 5 ACC supercomputer from Spain, with 663,040 cores and a peak theoretical performance of 314 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

MareNostrum 5 is hosted by the Barcelona Supercomputing Center (BSC).

The manufacturer of the MareNostrum 5 ACC supercomputer is EVIDEN.

9 - CEA-HE supercomputer – France

Europe’s 9th fastest supercomputer in 2025 is the CEA-HE supercomputer from France, with 548,352     cores and a peak theoretical performance of 171.26 PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

The manufacturer of the CEA-HE supercomputer is EVIDEN.

10 – Njoerd supercomputer – United Kingdom

Europe’s 10th fastest supercomputer in 2025 is the Njoerd supercomputer from the UK, with 273,280      cores and a peak theoretical performance of 106.28   PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

The manufacturer of the Njoerd supercomputer is HPE.

2 – What is the world’s fastest supercomputer in 2025?

The world’s fastest supercomputer in 2025 is the El Capitan supercomputer in the United States, with 11,039,616       cores and a peak theoretical performance of 2,746.38       PFlop/s or Petaflops. One petaflop is equal to 1 quadrillion (1,000,000,000,000,000) calculations per second. 

The manufacturer of the world’s fastest supercomputer in 2025, the El Capitan supercomputer, is HPE.