JAEA SGI ICE X

Also known as JAEA SGI ICE X (CCSE, 2015); Japan Atomic Energy Agency ICE X

Operated by JAEA .

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: 1.93 PFlop/s
Rpeak: 2.41 PFlop/s
Rmax ÷ Rpeak: 80.1%
Cores: 60,240
Power: 3.01 MW
Per watt: 0.6 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	- SGI ICE X blade cluster, 2,510 nodes in 35 racks	SGI HPENYSE rolls up to Hewlett Packard Enterprise	-	Verified	finance.yahoo.com top500.org
CPU	- Intel Xeon E5-2680 v3 12C 2.5GHz, 60,240 cores	Intel INTCNASDAQ	-	Verified	finance.yahoo.com top500.org
Interconnect	Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond 4x FDR InfiniBand	NVIDIA NVDANASDAQ	-	Verified	finance.yahoo.com top500.org
Storage	Lustre Storage Parallel filesystem, separate metadata and object servers SGI InfiniteStorage 17500, about 5 PB physical capacity, Lustre parallel file system	SGI HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	finance.yahoo.com
Operating system	SUSE Linux Enterprise Server Operating systems Linux distribution · Open source, commercial support subscription SUSE Linux Enterprise Server 11	SUSE	-	Reported	top500.org

The read

SGI ICE X cluster of the Japan Atomic Energy Agency's computing centre. The SGI announcement of 30 June 2015 gives 2,510 nodes in 35 racks with Intel Xeon E5-2680 v3 processors (60,240 cores), about 157 TB of memory, a 2.4 PFlop/s theoretical peak (about twelve times the previous system), 4x FDR InfiniBand, about 5 PB of SGI InfiniteStorage 17500 on Lustre, and operation from November 2015. TOP500 independently lists 60,240 cores, 1.93 PFlop/s Rmax, 2.41 PFlop/s Rpeak and 3,012 kW, ranked 35th on the November 2015 list and last seen in November 2020. The previous JAEA system was the PRIMERGY BX900 cluster in this dataset. The machine room location is not stated on the pages fetched, so no site is recorded; status is held as of the last TOP500 appearance.

Timeline

2015-11 List debut at #35 (November 2015) source
2015-11 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.

#35: TOP500, November 2015 →

Change history

2026-10-09 Added JAEA SGI ICE X

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.

One cited source was readable and does not mention this system; another could not be read because the host returned a bot challenge. The unreadable one may well be fine, so this is weaker evidence than a corroborated row and much stronger than an unsupported one. See how this check works.

Cited source	Result	Found on the page
finance.yahoo.com	could not be fetched	-
top500.org	does not name this system	Mellanox InfiniBand FDR, SUSE Linux Enterprise Server

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