Supercomputers/Systems/JUPITER

Germany · operational · mixed

JUPITER

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Quantum: linked to JION (qubit count not published), JUPSI (4,400 annealing qubits)

Deep dive: JUPITER: Europe's exascale, American silicon

Also known as JUPITER Booster

Operated by Forschungszentrum Julich at Julich Supercomputing Centre .

Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1263 of 1345 systems have a readable citation that names them, and 56 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.

Measured performance

Rmax: 1.00 EFlop/s
Rpeak: 1.23 EFlop/s
Rmax ÷ Rpeak: 81.5%
Cores: 4,801,344
Power: 15.79 MW
Per watt: 63.3 GF/W

Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.

What this machine is made of

One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.

Role	Part	Supplier at build	Quantity	Confidence	Source
Integrator	- Eviden BullSequana XH3000	Eviden ATOEPA rolls up to Atos	-	Reported	fz-juelich.de eurohpc-ju.europa.eu
Accelerator	NVIDIA GH200 Grace Hopper Superchip Accelerators Arm CPU + CUDA GPU · TSMC 4N NVIDIA GH200 Superchip	NVIDIA NVDANASDAQ	-	Reported	fz-juelich.de eurohpc-ju.europa.eu
CPU	NVIDIA Grace CPUs Armv9 (Neoverse V2) · 72C · 3.1 GHz · TSMC 4N NVIDIA GH200 Superchip	NVIDIA NVDANASDAQ	-	Reported	fz-juelich.de eurohpc-ju.europa.eu
Interconnect	NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds Infiniband NDR200	NVIDIA NVDANASDAQ	-	Reported	fz-juelich.de eurohpc-ju.europa.eu
Storage	IBM Spectrum Scale ESS (GPFS) Storage Parallel filesystem (GPFS), erasure-coded declustered RAID · 250 PB on Summit (Alpine) · About 2.5 TB/s 29 Petabyte Flash Module (ExaFLASH) based on the IBM Storage Scale software	IBM IBMNYSE	-	Verified	fz-juelich.de nextplatform.com
Cooling	Direct liquid cooling, warm water Cooling Direct-to-chip cold plates, facility water loop · Removes 90+ percent of node heat to liquid BullSequana XH3000: direct liquid cooled platform	Eviden ATOEPA rolls up to Atos	-	Reported	fz-juelich.de eurohpc-ju.europa.eu
Operating system	Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription Redhat Enterprise Linux (RHEL) 9 distribution	Red Hat IBMNYSE rolls up to IBM	-	Verified	apps.fz-juelich.de top500.org

AI datacenter metrics

Figures beyond an accelerator count, each with who stated it. What can and cannot be compared across AI datacenters.

Metric	Value	As of	Basis	Note	Source
Accelerators	24,000 accelerators	2025-09	Third-party estimate	NVIDIA says 24,000 GH200; Next Platform derives 23,536 from the TOP500 core count. FZJ page gives no count. Vendor-stated, not operator-stated.	blogs.nvidia.com nextplatform.com

The read

Europe's first exascale-class system, procured by EuroHPC and hosted at Julich on Eviden's BullSequana XH3000 with NVIDIA GH200 Superchips. Ranked #5 on the June 2026 TOP500 list; Rmax and Rpeak are independently confirmed by EuroHPC JU's own supercomputers page and separately by NVIDIA's own announcement, but the core count and power draw are TOP500-only figures with no independent operator confirmation.

Timeline

2022 Announced source
2025-06 List debut at #21 (June 2025) source
2025-09 First operational source

Public list appearances

Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.

Site & facility

Julich Supercomputing Centre

Location: Julich, Germany
Cooling: Direct liquid cooling
Commissioned: 2004

fz-juelich.de

Change history

2026-10-04 Added AI datacenter metrics for jupiter
2026-09-22 Gained a Green500 rank pointer (#21 on the 2025-06 list)

Source check

We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.

Cited source	Result	Found on the page
top500.org	names system and part	NVIDIA GH200 Grace Hopper Superchip, NVIDIA InfiniBand NDR (Quantum-2)
eurohpc-ju.europa.eu	names system and part	NVIDIA GH200 Grace Hopper Superchip, Direct liquid cooling, warm water, NVIDIA Grace, NVIDIA InfiniBand NDR (Quantum-2), IBM Spectrum Scale ESS (GPFS)

Checked 2026-10-13 by pnpm verify. Re-run it and the table changes with the web.

Related news

2026-09-22 SiPearl Delivers 1st Rhea1 CPU Samples to Bull for JUPITER Supercomputer · HPCwire
SiPearl shipped the first Rhea1 samples to Bull for integration onto the BullSequana XH3000 platform that forms JUPITER's CPU cluster module, the first delivery of a European-designed processor into a European-built exascale system and SiPearl's first revenue-bearing order. It's a concrete step on the domestic-substitution question this graph already flags for Rhea1: a European host CPU moving from lab benchmarking into an actual EuroHPC machine rather than staying a roadmap item.
2026-03-31 French state completes its acquisition of Bull from Atos · Atos Group
The state becomes sole owner of Bull's HPC, quantum and AI divisions for up to 404 million euros, nine months after the July 2025 purchase agreement, formalizing Bull as a sovereign supplier rather than a subsidiary of a financially troubled parent. Bull's BullSequana platform underpins JUPITER, so this is a change of ownership sitting directly upstream of an existing exascale system in this dataset, not just a balance sheet event.
2025-11-17 TOP500's 66th list confirms JUPITER as the first exascale system outside the US · TOP500
El Capitan holds number one at a remeasured 1.809 exaflop/s and Frontier and Aurora hold two and three, so all three US exascale systems in this dataset keep their relative order. JUPITER's 1.000 exaflop/s Booster partition becomes the fourth exascale system worldwide and the first in Europe, confirming the milestone this dataset's earlier rows on Bull's JUPITER delivery had been building toward.

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