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Europe's Fastest Supercomputer Is Finally Getting Its Domestic Silicon Infusion

Summary by The Register
Bull, the system builder behind JUPITER, takes delivery of SiPearl's long-awaited Rhea1 CPUs

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The Jupiter supercomputer, the most powerful in the European Union, began to receive SiPearl's Rhea1 CPUs for a partition dedicated to scientific loads that do not always take advantage of GPUs. Integration seeks to turn part of the system into a European silicon showcase, although the team's record performance still depends on thousands of Nvidia's GH200 superchips.

Europe's largest supercomputer has so far been built entirely around American CPUs. Now the first European chips are ready for the machine.

By providing its first Rhea1 processors to the Bull Group, SiPearl is delivering on the vision of European sovereignty over servers and supercomputer chips.

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ChannelNews broke the news on Tuesday, September 22, 2026.
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