USA · operational · classified

El Dorado

Operated by Sandia National Laboratories at Sandia National Laboratories, Albuquerque .

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: 68.02 PFlop/s
Rpeak: 95.29 PFlop/s
Rmax ÷ Rpeak: 71.4%
Cores: 383,040
Power: 1.11 MW
Per watt: 61.3 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	- HPE Cray EX4000 / EX255a	Hewlett Packard Enterprise HPENYSE	-	Reported	top500.org
Accelerator	AMD Instinct MI300A Accelerators ROCm (CDNA 3) · TSMC N5/N6 · 550 W AMD Instinct MI300A (384 nodes, 3 cabinets)	AMD AMDNASDAQ	-	Verified	top500.org newsreleases.sandia.gov
CPU	AMD 4th Gen EPYC 24C (in MI300A) CPUs x86-64 · 24C · 1.8 GHz · TSMC N5 AMD 4th Gen EPYC 24C 1.8GHz (integrated in MI300A)	AMD AMDNASDAQ	-	Reported	top500.org
Interconnect	HPE Slingshot-11 Interconnect Dragonfly · 200 Gb/s per port · Around 2 microseconds HPE Slingshot	Hewlett Packard Enterprise HPENYSE	-	Reported	top500.org
Operating system	Tri-Lab Operating System Stack Operating systems Linux distribution, RHEL-derived, HPC-tuned · Open source, LLNL-maintained TOSS	Lawrence Livermore National Laboratory	-	Reported	top500.org

The read

Sandia's own release calls this an application-readiness test system for NNSA's stockpile-stewardship program, an on-ramp so codes can be validated before running at exascale on El Capitan, without using the word classified itself; we record the workload class as classified on the strength of the mission context rather than an explicit label, and mark this row reported rather than verified for that reason.

Timeline

2024-11 Announced source
2024-11 List debut at #13 (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

Sandia National Laboratories, Albuquerque

Location: Albuquerque, NM, USA
Cooling: Chilled water
Commissioned: 1990

sandia.gov

Change history

2026-09-22 Gained a Green500 rank pointer (#13 on the 2024-11 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
newsreleases.sandia.gov	names system only	-
top500.org	names system and part	AMD Instinct MI300A, HPE Slingshot-11

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