Jean Zay H100

Operated by GENCI at IDRIS .

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: 52.18 PFlop/s
Rpeak: 71.42 PFlop/s
Rmax ÷ Rpeak: 73.1%
Cores: 227,136
Power: -
Per watt: - 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 (14 racks)	Eviden ATOEPA rolls up to Atos	-	Verified	top500.org genci.fr
Accelerator	NVIDIA H100 SXM5 Accelerators CUDA (Hopper GH100) · 16,896C · 1.98 GHz · TSMC 4N · 700 W 1,456 NVIDIA H100 SXM5 80GB GPUs	NVIDIA NVDANASDAQ	-	Verified	top500.org genci.fr
CPU	Intel Xeon Platinum 8468 CPUs x86-64 · 48C · 2.1 GHz · Intel 7 · 350 W Intel Xeon Platinum 8468 48C 2.1GHz	Intel INTCNASDAQ	-	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
Operating system	Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription Red Hat Enterprise Linux	Red Hat IBMNYSE rolls up to IBM	-	Reported	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	1,456 accelerators	2024-11	Operator stated	H100 partition: 14 racks of BullSequana AI 1200H. Added to the existing A100 and V100 partitions.	genci.fr

The read

An H100 expansion of France's flagship national system, operated jointly by CNRS/IDRIS and GENCI under the France 2030 program: 1,456 H100s added atop pre-existing A100 and V100 partitions, on Eviden BullSequana XH3000 hardware. GENCI's own release names both foundation-model training and traditional simulation workloads, which is why this row is tagged mixed.

Timeline

2024-03 Announced source
2024-06 First operational source
2026-06 List debut at #49 (June 2026) source

Public list appearances

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

#49: TOP500, June 2026 →

Site & facility

IDRIS

Location: Orsay, France
Commissioned: 2024

genci.fr

Change history

2026-10-04 Added AI datacenter metrics for jean-zay-h100

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 H100 SXM5, Intel Xeon Platinum 8468, NVIDIA InfiniBand NDR (Quantum-2)
genci.fr	does not name this system	NVIDIA H100 SXM5, NVIDIA InfiniBand NDR (Quantum-2)

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