KMA Cray X1E

Also known as KMA's 2nd supercomputer; Cray X1E (4GB)

Operated by Korea Meteorological Administration .

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: 15.71 TFlop/s
Rpeak: 18.44 TFlop/s
Rmax ÷ Rpeak: 85.2%
Cores: 1,020
Power: -
Per watt: - 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 X1E vector supercomputer	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Verified	weather.go.kr top500.org
CPU	- Cray X1E 2C 1.13GHz multi-streaming processors, 1,020 cores	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org weather.go.kr
Interconnect	- Crossbar interconnect	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org
Operating system	- UNICOS	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org

The read

The Korea Meteorological Administration's second-generation supercomputer, a Cray X1E that followed an initial Cray X1 stage (October 2004) with a final stage in August 2005, per KMA's history page. KMA's supercomputer page gives 18.5 TFlop/s theoretical peak, 1,024 cores, 4 TB of memory, 88 TB of RAID 5 shared storage and 1 PB of backup, and says it operated from 2005 to 2012. TOP500 lists a Cray X1E (4GB) with 1,020 multi-streaming-processor cores at 1.13 GHz on a crossbar under UNICOS, 15.71 TFlop/s Rmax and 18.44 TFlop/s Rpeak, 16th on the November 2005 list and last seen in November 2007; TOP500 also carries smaller earlier X1 and X1E entries for the same site. The machine room is not named for this generation, so no site is recorded.

Timeline

2005 First operational source
2005-11 List debut at #16 (November 2005) source
2012 Decommissioned source

Public list appearances

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

#16: TOP500, November 2005 →

Change history

2026-10-09 Added KMA Cray X1E

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	-
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.