Armstrong (Navy DSRC)

Also known as Navy DSRC Cray XC30 Armstrong

Operated by Navy DSRC at Navy DSRC (Stennis Space Center) .

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: 514.90 TFlop/s
Rpeak: 761.05 TFlop/s
Rmax ÷ Rpeak: 67.7%
Cores: 38,608
Power: 1.08 MW
Per watt: 0.5 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 XC30	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org web.archive.org
Accelerator	- Intel Xeon Phi 5120D coprocessors, 124 nodes per Navy DSRC page	Intel INTCNASDAQ	-	Reported	top500.org web.archive.org
CPU	Intel Xeon E5-2697 v2 CPUs x86-64 · 12C · 2.7 GHz · 22 nm · 130 W Intel Xeon E5-2697v2 12C 2.7GHz	Intel INTCNASDAQ	-	Reported	top500.org web.archive.org
Interconnect	Cray Aries Interconnect Dragonfly · About 10 GB/s per direction · Around 1 microsecond Cray Aries interconnect	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org web.archive.org
Operating system	Cray Linux Environment Operating systems Linux, Cray-customised · Proprietary layer over open-source Linux Cray Linux Environment	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org web.archive.org

The read

Cray XC30 at the Navy DoD Supercomputing Resource Center. TOP500 lists Intel Xeon E5-2697v2 12C 2.7GHz processors with Intel Xeon Phi 5120D coprocessors on the Aries interconnect running Cray Linux Environment, 38,608 cores, Rmax 514.90 TFlop/s, Rpeak 761.05 TFlop/s and 1,081.02 kW; it first appeared 96th on the November 2014 list and was last listed 403rd in June 2017. A Navy DSRC hardware page captured by the Internet Archive in 2015 describes Armstrong as a Cray XC30 rated at 786 TFLOPS with 1,215 standard 24-core E5-2697v2 nodes, 8 large-memory nodes and 124 Xeon Phi nodes on Cray Aries; the rating differs from TOP500's Rpeak, so the tier is reported. Named Armstrong (Navy DSRC) to distinguish it from other systems called Armstrong.

Timeline

2014 First operational source
2014-11 List debut at #96 (November 2014) source

Public list appearances

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

#96: TOP500, November 2014 →

Site & facility

Navy DSRC (Stennis Space Center)

Location: Stennis Space Center, MS, USA

penguinsolutions.com executivegov.com

Change history

2026-10-09 Added Armstrong (Navy DSRC)

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
web.archive.org	names system and part	Intel Xeon E5-2697 v2, Cray Aries, Cray Linux Environment
top500.org	names system and part	Intel Xeon E5-2697 v2, Cray Aries, Cray Linux Environment

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