Supercomputers/Systems/Deucalion
Portugal · operational · hpc
Deucalion
Operated by MACC at Deucalion (Guimaraes) .
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
- 3.96 PFlop/s
- Rpeak
- 5.01 PFlop/s
- Rmax ÷ Rpeak
- 79.0%
- Cores
- 78,336
- Power
- 371.72 kW
- Per watt
- 10.7 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 | - Fujitsu, with Atos BullSequana for the x86 partitions | Fujitsu | - | Verified | eurohpc-ju.europa.eutop500.org |
| CPU | Fujitsu A64FX CPUs Armv8.2-A SVE · 48C · 2.2 GHz · 7 nm Fujitsu A64FX 48C 2.2GHz | Fujitsu | - | Reported | top500.orgeurohpc-ju.europa.eu |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds InfiniBand HDR100 | NVIDIA | - | Reported | top500.org |
The read
Portugal's EuroHPC system, managed by MACC and built by Fujitsu, inaugurated in September 2023, with an A64FX ARM partition (the one TOP500 lists), x86 partitions and a small NVIDIA A100 partition. It ranked 219th in June 2024 and has slipped since. EuroHPC and the Deucalion site both describe it, but the site is the only source for the inauguration. TOP500 is the only source for Rmax, Rpeak and core count, so the tier is reported.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Deucalion (Guimaraes)
- Location
- Guimaraes, Portugal
- Commissioned
- 2023
Change history
- 2026-09-22 Gained a Green500 rank pointer (#80 on the 2024-06 list)
- 2026-09-20 Added with a rank pointer on the edition where it ranked highest
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 |
|---|---|---|
| deucalion.acnca.pt | blocked our fetch | - |
| top500.org | names system and part | Fujitsu A64FX, NVIDIA InfiniBand HDR |
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.