Supercomputers/Systems/Abisko
Sweden · decommissioned · hpc
Abisko
Also known as HPC2N Abisko
Operated by HPC2N at HPC2N Machine Room (Umea) .
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
- 131.90 TFlop/s
- Rpeak
- 160.74 TFlop/s
- Rmax ÷ Rpeak
- 82.1%
- Cores
- 15,456
- Power
- 252.7 kW
- Per watt
- 0.5 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 | - Supermicro H8QG6 | Supermicro | - | Reported | top500.org |
| CPU | - AMD Opteron 6238 12C 2.6GHz, 4 per thin node | AMD | - | Verified | top500.orghpc2n.umu.se |
| Interconnect | Mellanox InfiniBand QDR Interconnect Fat tree · 40 Gb/s per 4x port 40 Gb/s Mellanox InfiniBand (QDR) | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Verified | hpc2n.umu.setop500.org |
The read
Umea University's Supermicro H8QG6 cluster: 318 thin nodes of four AMD Opteron 6238 12-core processors and 10 fat nodes with Opteron 6344, on 40 Gb/s Mellanox InfiniBand, installed in fall 2011, fully operational in spring 2012, extended by ten nodes in January 2014 and decommissioned on 30 September 2020. TOP500 lists 15,456 cores, 131.9 TFlop/s Rmax, 160.74 TFlop/s peak and 252.7 kW, ranking it 130th in June 2012; HPC2N counts 15,744 cores and 163.74 TFlop/s peak for the whole machine. TOP500 figures are used so the entry matches the list.
Timeline
- 2012 First operational source
- 2012-06 List debut at #130 (June 2012) source
- 2020-09-30 Decommissioned source
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-10-02 Added Abisko, HPC2N
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 |
|---|---|---|
| hpc2n.umu.se | names system and part | Mellanox InfiniBand QDR |
| top500.org | names system and part | Mellanox InfiniBand QDR |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.