USA · operational · classified

Trinity

Also known as ATS-1

Operated by Los Alamos National Laboratory at Los Alamos Strategic Computing Complex .

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: 32 of 52 systems have a readable citation that names them, and 4 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: 20.16 PFlop/s
Rpeak: 41.46 PFlop/s
Rmax ÷ Rpeak: 48.6%
Cores: 979,072
Power: 7.58 MW
Per watt: 2.7 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	- Cray XC40	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	lanl.gov sandia.gov
Accelerator	Intel Xeon Phi 7250 (Knights Landing) Accelerators Intel Xeon Phi 7250 68C 1.4GHz	Intel INTCNASDAQ	-	Reported	lanl.gov sandia.gov
CPU	Intel Xeon E5-2698 v3 CPUs Xeon E5-2698v3 16C 2.3GHz	Intel INTCNASDAQ	-	Reported	lanl.gov sandia.gov
Interconnect	Cray Aries Interconnect Aries interconnect	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	lanl.gov sandia.gov
Storage	Lustre Storage Lustre	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	lanl.gov sandia.gov
Cooling	Liquid-assisted air (in-cabinet coil) Cooling Cray XC40 cabinet: transverse air across in-cabinet water coils	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	lanl.gov sandia.gov
Operating system	Cray Linux Environment Operating systems Cray Linux Environment	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	lanl.gov sandia.gov

The read

Jointly operated by Los Alamos and Sandia under the Advanced Simulation and Computing programme. Built in two phases with different silicon in each - Haswell Xeons first, Knights Landing Xeon Phi second - which makes it one of the clearer examples of why a system needs more than one accelerator edge in its lifetime. Current operational status has not been independently confirmed since its last public list appearance; we carry the last documented state rather than inferring a retirement.

Timeline

2014 Announced source
2017-06 List debut at #7 (June 2017) source
2017-06 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.

#7: TOP500, June 2017 →

Site & facility

Los Alamos Strategic Computing Complex

Location: Los Alamos, NM, USA
Cooling: Chilled water
Commissioned: 1993

lanl.gov

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.

None of the cited sources could be read from our network: the hosts returned bot challenges or did not respond. This check says nothing about the citations either way. See how this check works.

Cited source	Result	Found on the page
lanl.gov	blocked our fetch	-
sandia.gov	blocked our fetch	-

Checked 2026-09-08 by pnpm verify. Re-run it and the table changes with the web.