South Korea · operational · hpc

Nuri

Also known as KMA Meteorological Supercomputer 4 (Nuri)

Operated by Korea Meteorological Administration at KMA Supercomputer Centre (Ochang) .

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: 2.40 PFlop/s
Rpeak: 2.90 PFlop/s
Rmax ÷ Rpeak: 82.8%
Cores: 69,600
Power: 1.36 MW
Per watt: 1.8 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 XC40	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org weather.go.kr
CPU	Intel Xeon E5-2690 v3 CPUs x86-64 · 12C · 2.6 GHz · 22 nm · 135 W Intel Xeon E5-2690v3 12C 2.6GHz	Intel INTCNASDAQ	-	Reported	top500.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
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

One of the twin Cray XC40 weather supercomputers (with Miri) of the Korea Meteorological Administration's fourth-generation system. TOP500 lists Xeon E5-2690v3 12C 2.6GHz processors on the Aries interconnect with Cray Linux Environment, 69,600 cores, Rmax 2.40 PFlop/s, Rpeak 2.90 PFlop/s and 1,359.38 kW; it ranked 29th on the November 2015 list and was last listed in November 2021 at rank 251. KMA's history page independently records the fourth Meteorological Supercomputer as a Cray XC40, with an initial stage in December 2014 and a final stage in December 2015, housed at its National Center for Meteorological Supercomputer in Ochang; it does not name the machines, so the Nuri and Miri names and figures rest on TOP500 and the tier is reported. The Lenovo pair Guru and Maru, installed in 2021, are already in the register.

Timeline

2015 First operational source
2015-11 List debut at #29 (November 2015) source

Public list appearances

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

#29: TOP500, November 2015 →

Site & facility

KMA Supercomputer Centre (Ochang)

Location: Ochang, Chungcheongbuk-do, South Korea
Commissioned: 2010

weather.go.kr

Change history

2026-10-07 Added Nuri, a Korea Meteorological Administration Cray XC40

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 E5-2690 v3, Cray Aries, Cray Linux Environment
weather.go.kr	does not name this system	-

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