USA · operational · ai training

Selene

Name: NVIDIA (undisclosed US site)
Address: USA

Operated by NVIDIA at NVIDIA (undisclosed US site) .

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: 63.46 PFlop/s
Rpeak: 79.22 PFlop/s
Rmax ÷ Rpeak: 80.1%
Cores: 555,520
Power: 2.65 MW
Per watt: 24.0 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	- NVIDIA DGX A100 SuperPOD	NVIDIA NVDANASDAQ	-	Reported	nvidia.com
Accelerator	NVIDIA A100 SXM4 40GB Accelerators CUDA (Ampere GA100) · 6,912C · 1.41 GHz · 7 nm · 400 W NVIDIA A100 SXM4 40 GB	NVIDIA NVDANASDAQ	-	Reported	nvidia.com
CPU	AMD EPYC 7742 (Rome) CPUs x86-64 · 64C · 2.25 GHz · 7 nm · 225 W AMD EPYC 7742 64C 2.25GHz	AMD AMDNASDAQ	-	Reported	nvidia.com
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Mellanox HDR Infiniband	NVIDIA NVDANASDAQ	-	Verified	nvidia.com top500.org
Storage	DDN EXAScaler Storage Lustre appliance 7PB of DDN AI400X all-flash storage	DDN	-	Reported	prnewswire.com
Cooling	Air cooling (CRAC/CRAH) Cooling Room-level air handling · Practical ceiling around 15-20 kW per rack DGX A100 SuperPOD: air cooled	NVIDIA NVDANASDAQ	-	Reported	nvidia.com
Operating system	Ubuntu Server Operating systems Linux distribution · Open source, free with paid support tiers Ubuntu	Canonical	-	Reported	nvidia.com

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	2,240 accelerators	2020-06	Operator stated	Initial June 2020 build: 280 DGX A100 systems, 2,240 A100 GPUs. Later expanded; this is the launch configuration.	sdxcentral.com

The read

NVIDIA benchmarking its own reference architecture. Selene matters here as a calibration point rather than a science machine: it is one of the few DGX SuperPOD deployments measured under HPL, which gives the shadow-list estimator something real to anchor against when the commercial clusters built on the same design never report.

Timeline

2020 Announced source
2020-06 List debut at #7 (June 2020) source
2020-06 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

NVIDIA (undisclosed US site)

Location: USA
Commissioned: 2020

nvidia.com

Change history

2026-09-22 Gained a Green500 rank pointer (#36 on the 2023-11 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
sdxcentral.com	names system and part	NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR
servethehome.com	names system and part	NVIDIA A100 SXM4 40GB, AMD EPYC 7742 (Rome), NVIDIA InfiniBand HDR

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