Supercomputers/Systems/Fionn
Ireland · decommissioned · hpc
Fionn
Also known as ICHEC Fionn SGI ICE X
Operated by ICHEC .
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
- 140.45 TFlop/s
- Rpeak
- 147.46 TFlop/s
- Rmax ÷ Rpeak
- 95.2%
- Cores
- 7,680
- Power
- 114.5 kW
- Per watt
- 1.2 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 cluster with UV2000 fat node | SGI HPENYSE
rolls up to Hewlett Packard Enterprise | - | Reported | top500.orgen.wikipedia.org |
| Accelerator | NVIDIA Tesla K20X Accelerators CUDA (Kepler GK110) · 2,688C · 0.732 GHz · 28 nm · 235 W NVIDIA Tesla K20X GPUs in the hybrid partition | NVIDIA | - | Reported | en.wikipedia.org |
| CPU | - Intel Xeon E5-2695v2 12-core 2.4 GHz, 320 thin nodes | Intel | 320 reported | Reported | top500.orgen.wikipedia.org |
| Interconnect | Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond Mellanox InfiniBand FDR | NVIDIA | - | Reported | top500.org |
The read
Ireland's national supercomputer for academic research before Kay: an SGI ICE X cluster of 320 Ivy Bridge nodes (Xeon E5-2695v2, 7,680 cores) on InfiniBand FDR, with a hybrid partition of nodes carrying Xeon Phi 5110P coprocessors and NVIDIA K20X GPUs and a UV2000 shared-memory fat node. TOP500 lists 140.45 TFlop/s Rmax, 147.46 TFlop/s Rpeak and 114.5 kW, 359th in November 2013 and 477th in June 2014. ICHEC's 2018 announcement of the new national supercomputer says it replaces Fionn, which was installed in 2013; Wikipedia gives August 2018 as the shutdown month, so only the year is recorded.
Timeline
- 2013 First operational source
- 2013-11 List debut at #359 (November 2013) source
- 2018 Decommissioned source
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Change history
- 2026-10-09 Added Fionn
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 |
|---|---|---|
| ichec.ie | names system only | - |
| top500.org | names system and part | Mellanox InfiniBand FDR |
Checked 2026-10-13 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.