USA · decommissioned · hpc

Sky Bridge

Also known as Skybridge

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: 532.90 TFlop/s
Rpeak: 615.35 TFlop/s
Rmax ÷ Rpeak: 86.6%
Cores: 29,584
Power: 675 kW
Per watt: 0.8 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 CS300-LC	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Verified	top500.org sandia.gov
CPU	Intel Xeon E5-2670 CPUs x86-64 · 8C · 2.6 GHz · 32 nm · 115 W Intel Xeon E5-2670 8C 2.6GHz	Intel INTCNASDAQ	-	Reported	top500.org
Interconnect	- Intel True Scale	Intel INTCNASDAQ	-	Reported	top500.org
Cooling	- Hybrid liquid/air-cooled design	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	sandia.gov

The read

Sandia's first Institutional Computing system, a Cray CS300-LC (hybrid liquid/air cooled) cluster. Sandia's December 2014 news item reports a December 18, 2014 ribbon cutting, availability to users in January 2015, 600 teraflops, 1,848 nodes and about 259 million processor hours a year, funded by a new Institutional Computing program with $10 million in support. TOP500 lists 29,584 Xeon E5-2670 8C 2.6GHz cores on Intel True Scale, Rmax 532.9 TFlop/s, Rpeak 615.3 TFlop/s and 675 kW, ranked 123rd in June 2015 and on five lists to June 2017. No retirement date was found in a fetched source and it left the TOP500 after June 2017, so it is recorded as decommissioned with no date. TOP500 is the only source for Rmax, so the tier is reported.

Timeline

2015-01 First operational source
2015-06 List debut at #123 (June 2015) source

Public list appearances

Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.

#123: TOP500, June 2015 →

Site & facility

Sandia National Laboratories, Albuquerque

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

sandia.gov

Change history

2026-10-02 Added Sky Bridge, Sandia's Cray CS300-LC

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 and part	Intel Xeon E5-2670
sandia.gov	names system only	-

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