Supercomputers/Systems/CRONOS
France · operational · hpc
CRONOS
Operated by EDF at EDF Val-de-Reuil .
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
- 4.30 PFlop/s
- Rpeak
- 7.14 PFlop/s
- Rmax ÷ Rpeak
- 60.2%
- Cores
- 81,600
- Power
- 1.23 MW
- Per watt
- 3.5 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 | - BullSequana X | Bull | - | Reported | top500.org |
| CPU | - Xeon Platinum 8260 24C 2.4GHz | Intel | - | Reported | top500.org |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Infiniband HDR | NVIDIA | - | Reported | top500.org |
The read
EDF's BullSequana X cluster of Intel Xeon Platinum 8260 (24-core, 2.4 GHz) CPUs on InfiniBand HDR, 81,600 cores in total with 4.30 PFlop/s Rmax, 7.14 PFlop/s Rpeak and about 1.2 MW of measured power on the TOP500. It debuted at rank 67 on the November 2020 list, its best placing, and was still listed at rank 327 on the June 2026 list, which is the basis for the operational status. TOP500 lists the site as Val-de-Reuil, France. The CPU-only design serves EDF R&D and engineering simulation; the TOP500 page is the only source fetched, so confidence 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
Change history
- 2026-10-02 Added CRONOS, EDF's BullSequana X cluster, 67th on the November 2020 TOP500
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 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.