CARL and EDDY

Also known as Oldenburg CARL cluster

Operated by University of Oldenburg at University of Oldenburg HPC site .

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: 457.23 TFlop/s
Rpeak: 601.34 TFlop/s
Rmax ÷ Rpeak: 76.0%
Cores: 12,960
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	- Lenovo NeXtScale nx360 M5 nodes (CARL and EDDY)	Lenovo 992HKEX	-	Verified	top500.org uol.de
CPU	Intel Xeon E5-2650 v4 CPUs x86-64 · 12C · 2.2 GHz · 14 nm Intel Xeon E5-2650 v4 12C 2.2GHz in the standard and low-memory CARL nodes	Intel INTCNASDAQ	-	Verified	uol.de top500.org
Interconnect	Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond InfiniBand 4x FDR, 56 Gb/s	NVIDIA NVDANASDAQ	-	Verified	uol.de top500.org

The read

The University of Oldenburg's two new Lenovo NeXtScale research clusters, CARL (multi-purpose) and EDDY (wind energy and turbulence research), entered as a single TOP500 entry of 12,960 cores, 457.2 TFlop/s Rmax and 601.3 TFlop/s Rpeak on InfiniBand FDR, at 364th in November 2016 and 472nd in June 2017. The university press release of 15 November 2016 says the pair together reached the Top-500 (it quotes 363rd place) with 457.2 TFlop/s and that the total investment was five million euros; the CARL page lists 327 CARL nodes with 7,640 cores and 271 TFlop/s theoretical peak on 4x FDR InfiniBand, so the rest of the 12,960 cores belong to EDDY.

Timeline

2016 First operational source
2016-11 List debut at #364 (November 2016) source

Public list appearances

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

#364: TOP500, November 2016 →

Site & facility

University of Oldenburg HPC site

Location: Oldenburg, Germany

uol.de

Change history

2026-10-07 Added CARL and EDDY, a mid-list TOP500 system (2016-11 364)

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 E5-2650 v4, Mellanox InfiniBand FDR
uol.de	does not name this system	-

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