USA · operational · mixed

Henri

Name: Flatiron Institute Data Center (New Jersey)
Address: USA

Operated by Flatiron Institute at Flatiron Institute Data Center (New Jersey) .

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: 2.88 PFlop/s
Rpeak: 3.58 PFlop/s
Rmax ÷ Rpeak: 80.4%
Cores: 8,288
Power: 44.07 kW
Per watt: 65.4 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	- Lenovo ThinkSystem SR670 V2	Lenovo 992HKEX	-	Verified	top500.org simonsfoundation.org
Accelerator	NVIDIA H100 80GB PCIe Accelerators CUDA (Hopper) NVIDIA H100 80GB PCIe, 8 per server across 10 servers	NVIDIA NVDANASDAQ	80 reported	Verified	simonsfoundation.org top500.org
CPU	Intel Xeon Platinum 8362 (Ice Lake) CPUs x86-64 · 32C · 2.8 GHz · Intel 10nm SuperFin Intel Xeon Platinum 8362 32C 2.8GHz	Intel INTCNASDAQ	-	Reported	top500.org simonsfoundation.org
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds NVIDIA Quantum InfiniBand HDR	NVIDIA NVDANASDAQ	-	Reported	top500.org simonsfoundation.org

The read

Built by the Flatiron Institute, the Simons Foundation's internal computational research division, Henri was the first system anywhere to use NVIDIA's H100 GPU and topped the Green500 list in November 2022 at 65.09 GFlops/Watt, a title it held for three consecutive editions before the GH200 generation overtook it. By November 2024 it had settled to eighth place at 65.4 GFlops/Watt, still ahead of most much larger machines in this dataset, which is the point of the comparison: efficiency and scale are different axes, and Henri never tried to compete on the second one. TOP500's own system page and the Simons Foundation's release independently confirm the hardware and the historical rank, so the tier is verified.

Timeline

2022 Announced source
2022-11 First operational source
2024-11 List debut at #8 (November 2024) 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

Flatiron Institute Data Center (New Jersey)

Location: USA
Commissioned: 2022

simonsfoundation.org top500.org

Change history

2026-09-24 Henri added (Flatiron Institute, USA)

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, part and count	Intel Xeon Platinum 8362 (Ice Lake), NVIDIA H100 80GB PCIe, NVIDIA InfiniBand HDR · counts: 80
simonsfoundation.org	does not name this system	NVIDIA H100 80GB PCIe, NVIDIA InfiniBand HDR

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