South Korea · decommissioned · hpc

Haedam

Also known as KMA Cray XE6 (research system)

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: 316.40 TFlop/s
Rpeak: 379.01 TFlop/s
Rmax ÷ Rpeak: 83.5%
Cores: 45,120
Power: 1.71 MW
Per watt: 0.2 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 XE6, one of two identical halves of KMA's third supercomputer	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org weather.go.kr
CPU	- AMD Opteron 6172 12C 2.1GHz, 45,120 cores	AMD AMDNASDAQ	-	Reported	top500.org
Interconnect	Cray Gemini Interconnect 3D torus · About 6 GB/s per direction per link · Around 1 microsecond Cray Gemini interconnect	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org

The read

Second Cray XE6 of the Korea Meteorological Administration's third supercomputer, the twin of Haeon (45,120 Opteron 6172 12-core 2.1 GHz cores each on the Gemini network). KMA's supercomputer page describes the third supercomputer as a Cray XE6 totalling 758 TFlop/s peak and 90,240 cores (twice 45,120) with 120 TB of memory, in service 2010 to 2016, and its history page records the final stage in December 2010 and the end of user service in May 2016. TOP500 lists this half as Haedam with 316.4 TFlop/s Rmax, 379.01 TFlop/s Rpeak and 1,711.6 kW, 20th on the November 2010 list and last seen in June 2015. The pages do not say which half served which role, so the tier is reported.

Timeline

2010 First operational source
2010-11 List debut at #20 (November 2010) source
2016-05 Decommissioned source

Public list appearances

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

#20: TOP500, November 2010 →

Site & facility

KMA Supercomputer Centre (Ochang)

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

weather.go.kr

Change history

2026-10-09 Added Haedam

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	Cray Gemini
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.