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Jupiter, Europe’s First Exascale‑Class Supercomputer, Inaugurated in Jülich

The Jülich system begins service to anchor a European AI Factory with a 1.4 exaflops target after initial component swaps.

Overview

  • After months of trials, the booster module has entered formal operation, with a June Top500 submission of 793 petaflops sustained and an FP64 target of about 1.4 exaflops once early issues are resolved.
  • The machine integrates roughly 24,000 Nvidia GH200 modules built by ParTec‑Eviden, underscoring reliance on U.S. chip designs while a smaller Rhea1‑based cluster is planned for 2026–2027.
  • Positioned for climate, medical and materials research, the system will also serve as the core of the Jupiter AI Factory, offering vastly higher mixed‑precision throughput for training large AI models.
  • Project outlays over the coming years total about €500 million, with dense warm‑water cooling and planned campus heat reuse supporting what operators call the most energy‑efficient exascale system among the top five.
  • Operators acknowledge early hardware faults and outages since May and say manufacturers are replacing parts under contract while the system continues running; a widely shared WELT item about a shutdown is labeled satire.