Germany · operational · mixed

JETI

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

Also known as JUPITER Exascale Transition Instrument

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: 1092 of 1153 systems have a readable citation that names them, and 40 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: 83.14 PFlop/s
Rpeak: 94.00 PFlop/s
Rmax ÷ Rpeak: 88.4%
Cores: 391,680
Power: 1.31 MW
Per watt: 63.4 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	- BullSequana XH3000, ParTec/Eviden, ten racks	Eviden ATOEPA rolls up to Atos	-	Reported	top500.org fz-juelich.de
Accelerator	NVIDIA GH200 Grace Hopper Superchip Accelerators Arm CPU + CUDA GPU · TSMC 4N NVIDIA GH200 Superchip	NVIDIA NVDANASDAQ	-	Reported	top500.org fz-juelich.de
CPU	NVIDIA Grace CPUs Armv9 (Neoverse V2) · 72C · 3.1 GHz · TSMC 4N Grace Hopper Superchip 72C 3GHz	NVIDIA NVDANASDAQ	-	Reported	top500.org
Interconnect	NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds Quad-Rail NVIDIA InfiniBand NDR200	NVIDIA NVDANASDAQ	-	Reported	top500.org

The read

The second JUPITER module at Forschungszentrum Julich, a ten-rack BullSequana XH3000 with NVIDIA GH200 Grace Hopper Superchips built by ParTec and Eviden that Julich presented on 18 November 2024 as roughly one twelfth of the final JUPITER system. It ranked 18th on the November 2024 TOP500 at 83.14 PFlop/s Rmax and sixth on the Green500 at 67.96 GFlops/Watt, on 1,310.72 kW (1,025.27 kW optimized). It is a distinct installation from the single-rack JEDI precursor and from the JUPITER booster itself.

Timeline

2024 Announced source
2024-11 List debut at #6 (November 2024) source
2024-11 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

2026-10-02 Added JETI, the JUPITER transition module, 18th on the November 2024 TOP500

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 Grace, NVIDIA InfiniBand NDR (Quantum-2)
fz-juelich.de	names system and part	NVIDIA GH200 Grace Hopper Superchip, NVIDIA Grace

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.