South Korea · operational · hpc

Uri

Also known as KMA Uri (Cray XC40 initial stage)

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: 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: 345.60 TFlop/s
Rpeak: 447.28 TFlop/s
Rmax ÷ Rpeak: 77.3%
Cores: 10,752
Power: 159.64 kW
Per watt: 2.2 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 E5-2690 v3 12C 2.6GHz, 10,752 cores	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

Cray XC40 of the Korea Meteorological Administration, listed by TOP500 as Uri: 10,752 Xeon E5-2690v3 12-core 2.6 GHz cores on the Aries network under the Cray Linux Environment, 345.6 TFlop/s Rmax, 447.28 TFlop/s Rpeak and 159.64 kW, installed in 2014. KMA's history page records the initial stage of the fourth supercomputer (a Cray XC40) in December 2014, followed by the final stage in December 2015, which is the Nuri and Miri pair already in this dataset. TOP500 first ranked Uri 148th on the November 2014 list and last listed it in June 2016. Which KMA partition the TOP500 entry represents is inferred from the matching dates, so the tier is reported.

Timeline

2014-11 List debut at #148 (November 2014) source
2014-12 First operational source

Public list appearances

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

#148: TOP500, November 2014 →

Site & facility

KMA Supercomputer Centre (Ochang)

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

weather.go.kr

Change history

2026-10-09 Added Uri

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.

Every source cited on this page was readable, and none of them mentions this system. They are cited at page granularity, normally because no stable deep link could be found. That is a real weakness in this row and it is why the system carries a confidence tier below verified. See how this check works.

Cited source	Result	Found on the page
top500.org	does not name this system	Intel Xeon E5-2690 v3, Cray Aries, Cray Linux Environment
weather.go.kr	does not name this system	-

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

Uri