Supercomputers/Systems/DAEDALUS
Greece · under construction · mixed
DAEDALUS
Operated by GRNET at Lavrion Technological and Cultural Park .
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
- 85.69 PFlop/s
- Rpeak
- 115.1 PFlop/s
- Rmax ÷ Rpeak
- 74.5%
- Cores
- 411,264
- Power
- 1.40 MW
- Per watt
- 61.4 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 | - HPE Cray EX254n; electromechanical fit-out by MainSys S.A. | Hewlett Packard Enterprise | - | Verified | top500.orggrnet.gr |
| Accelerator | NVIDIA GH200 Grace Hopper Superchip Accelerators Arm CPU + CUDA GPU · TSMC 4N >2,000 NVIDIA GH200 superchips | NVIDIA | - | Verified | top500.orgen.protothema.gr |
| CPU | NVIDIA Grace CPUs Armv9 (Neoverse V2) · 72C · 3.1 GHz · TSMC 4N NVIDIA Grace 72C 3.1GHz | NVIDIA | - | Reported | top500.org |
| Interconnect | HPE Slingshot-11 Interconnect Dragonfly · 200 Gb/s per port · Around 2 microseconds Slingshot-11 | Hewlett Packard Enterprise | - | Reported | top500.org |
| Cooling | Direct liquid cooling, warm water Cooling Direct-to-chip cold plates, facility water loop · Removes 90+ percent of node heat to liquid Direct liquid cooling | Hewlett Packard Enterprise | - | Reported | top500.orgen.protothema.gr |
| Operating system | Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription Red Hat Enterprise Linux | Red Hat | - | Reported | top500.org |
The read
The most powerful computing system ever ranked in Greece, and a genuine edge case for this schema: it has a real, published HPL result and TOP500 rank, yet both GRNET (its own operator) and EuroHPC JU stated as recently as June 2026 that it was not yet fully available to users. We record status as under_construction rather than operational, on the strength of the operator's own most recent public statement, rather than inferring readiness from the benchmark alone.
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
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 |
|---|---|---|
| top500.org | names system and part | NVIDIA GH200 Grace Hopper Superchip, NVIDIA Grace, HPE Slingshot-11 |
| eurohpc-ju.europa.eu | names system and part | NVIDIA GH200 Grace Hopper Superchip, NVIDIA Grace, Direct liquid cooling, warm water |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Inside a node
Why accelerators exist, what the memory hierarchy costs, and how the CPU and accelerator merged onto one package.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.