USA · operational · hpc

Chicoma

Also known as LANL Chicoma

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: 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: -
Rpeak: -
Rmax ÷ Rpeak: -
Cores: -
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	- HPE Cray EX (Cray Windom motherboard)	Hewlett Packard Enterprise HPENYSE	-	Reported	cug.org federallabs.org
CPU	AMD EPYC 7H12 (Rome, high frequency) CPUs x86-64 · 64C · 2.6 GHz · 7 nm · 280 W AMD EPYC 7H12, two per node, 2.6 GHz base	AMD AMDNASDAQ	-	Reported	cug.org federallabs.org
Interconnect	- HPE Slingshot interconnect	Hewlett Packard Enterprise HPENYSE	-	Reported	cug.org federallabs.org

The read

Early HPE Cray EX (Shasta) system at Los Alamos bought for DOE Office of Science ASCR under the 2020 CARES Act, for COVID-19 molecular dynamics, epidemiological modelling and bioinformatics. The CUG 2021 acceptance-testing paper describes 512 Slingshot-connected dual-socket AMD EPYC 7H12 compute nodes at that stage, liquid cooled, installed in phases starting from a testbed. A Federal Laboratory Consortium item reports installation in October 2020, more than 73,000 cores, 300 TB of memory and direct-to-chip liquid cooling; The GPU partition is not described in the fetched text. No FLOPS figure or current-status confirmation was found in a fetched source, so none is recorded.

Timeline

No dated events recorded.

Site & facility

Los Alamos Strategic Computing Complex

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

lanl.gov

Change history

2026-10-02 Added Chicoma, Los Alamos's early HPE Cray EX

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
cug.org	does not name this system	-
federallabs.org	names system and part	AMD EPYC 7H12 (Rome, high frequency)

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