Denmark · operational · hpc

Abacus 2.0

Also known as ABACUS2.0; DeiC National HPC Centre SDU

Operated by University of Southern Denmark at SDU National HPC Centre Odense .

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: 288.90 TFlop/s
Rpeak: 374.40 TFlop/s
Rmax ÷ Rpeak: 77.2%
Cores: 9,360
Power: 200 kW
Per watt: 1.4 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 nx360M5 cluster	Lenovo 992HKEX	-	Verified	top500.org neic.no
Accelerator	- NVIDIA Tesla K40 GPUs	NVIDIA NVDANASDAQ	-	Reported	top500.org
CPU	- Intel Xeon E5-2680v3 12C 2.5GHz	Intel INTCNASDAQ	-	Reported	top500.org
Interconnect	Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond InfiniBand FDR	NVIDIA NVDANASDAQ	-	Reported	top500.org

The read

Abacus 2.0 at the University of Southern Denmark, host of the DeiC National HPC Centre, a Lenovo NeXtScale nx360M5 cluster of Xeon E5-2680v3 nodes with NVIDIA Tesla K40 GPUs on InfiniBand FDR. The rank, cores, Rmax, Rpeak and power here are its best TOP500 appearance (243rd, June 2015, 9,360 cores, 288.9 TFlop/s Rmax, 200 kW); the cluster then grew to 17,928 cores and 462.4 TFlop/s Rmax from June 2016 and fell to 460th in June 2017. SDU's 25 March 2015 inauguration news (Danish) names it Abacus 2.0, and NeIC lists it as an active service with 14,016 processor cores and Lenovo as supplier.

Timeline

2015-03 First operational source
2015-06 List debut at #243 (June 2015) source

Public list appearances

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

#243: TOP500, June 2015 →

Site & facility

SDU National HPC Centre Odense

Location: Odense, Denmark

sdu.dk

Change history

2026-10-07 Added Abacus 2.0, a mid-list TOP500 system (2015-06 243)

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
neic.no	names system only	-
top500.org	names system and part	Mellanox InfiniBand FDR

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