USA · decommissioned · hpc

Cori

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: 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: 14.02 PFlop/s
Rpeak: 27.88 PFlop/s
Rmax ÷ Rpeak: 50.3%
Cores: 622,336
Power: 3.94 MW
Per watt: 3.6 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	docs.nersc.gov nersc.gov
Accelerator	Intel Xeon Phi 7250 (Knights Landing) Accelerators x86-64 (Knights Landing) · 68C · 1.4 GHz · 14 nm · 215 W Intel Xeon Phi 7250 68C 1.4GHz	Intel INTCNASDAQ	-	Reported	docs.nersc.gov nersc.gov
Interconnect	Cray Aries Interconnect Dragonfly · About 10 GB/s per direction · Around 1 microsecond Aries interconnect	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	docs.nersc.gov nersc.gov
Storage	Lustre Storage Parallel filesystem, separate metadata and object servers Lustre	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	docs.nersc.gov nersc.gov
Cooling	Liquid-assisted air (in-cabinet coil) Cooling In-cabinet air, water-cooled coil · Roughly 20-45 kW per cabinet Cray XC40 cabinet: transverse air across in-cabinet water coils	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	docs.nersc.gov nersc.gov
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	docs.nersc.gov nersc.gov

The read

One of the largest Xeon Phi deployments ever built, and a useful marker for how quickly that line disappeared: Intel discontinued Knights Landing in 2018, two years after Cori entered service. The installed base it represented left the graph within a single refresh cycle.

Timeline

2014 Announced source
2016-11 List debut at #5 (November 2016) source
2016-11 First operational source
2023 Decommissioned source
2023-05 Retired at noon Pacific time on May 31, after having run longer than any system in NERSC's history source

Public list appearances

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

#5: TOP500, November 2016 →

Site & facility

NERSC, Shyh Wang Hall

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

nersc.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.

Cited source	Result	Found on the page
docs.nersc.gov	names system and part	Cray Aries, Lustre
nersc.gov	does not name this system	-

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