USA · decommissioned · hpc

Edison

Operated by Lawrence Berkeley National Laboratory at NERSC, Shyh Wang Hall .

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: 1.65 PFlop/s
Rpeak: 2.57 PFlop/s
Rmax ÷ Rpeak: 64.4%
Cores: 133,824
Power: 3.75 MW
Per watt: 0.4 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
Interconnect	Cray Aries Interconnect Dragonfly · About 10 GB/s per direction · Around 1 microsecond Cray Aries Dragonfly interconnect	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.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

The read

NERSC's Cray XC30, opened for production on 14 January 2014 and retired on 13 May 2019 according to NERSC's own retirement article, which is where both dates come from. It ranked 19th in June 2014. NERSC says 134,064 cores and TOP500 says 133,824; TOP500's is used and the difference is left open. Rmax rests on TOP500 alone.

Timeline

2014-01 First operational source
2014-06 List debut at #19 (June 2014) source
2019-05 Decommissioned source

Public list appearances

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

#19: TOP500, June 2014 →

Site & facility

NERSC, Shyh Wang Hall

Location: Berkeley, CA, USA
Cooling: Direct liquid cooling with cooling towers
Commissioned: 2015

nersc.gov

Where sources disagree

We record conflicts instead of picking a winner quietly. All open questions.

Core count: 134,064 (NERSC) against 133,824 (TOP500). TOP500's figure is used.

Change history

2026-09-20 Added with a rank pointer on the edition where it ranked highest

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
nersc.gov	names system and part	Cray Aries
top500.org	names system and part	Cray Aries, Cray Linux Environment

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