Supercomputers/Systems/Occigen
France · upgraded · hpc
Occigen
Also known as GENCI Occigen bullx DLC
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
- 1.63 PFlop/s
- Rpeak
- 2.10 PFlop/s
- Rmax ÷ Rpeak
- 77.5%
- Cores
- 50,544
- Power
- 934.8 kW
- Per watt
- 1.7 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 | - Bull bullx DLC | Bull | - | Reported | top500.orgcines.fr |
| CPU | Intel Xeon E5-2690 v3 CPUs x86-64 · 12C · 2.6 GHz · 22 nm · 135 W Xeon E5-2690v3 12C 2.6GHz | Intel | - | Reported | top500.org |
| Interconnect | Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond Infiniband FDR | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Reported | top500.org |
The read
The Bull bullx DLC supercomputer that GENCI bought in 2014 and CINES hosts and administers in Montpellier, listed by TOP500 with 50,544 Xeon E5-2690v3 12-core cores on InfiniBand FDR, 27th on the November 2014 list (CINES's own page says twenty-sixth). CINES describes the machine in a later 3.5 petaflop configuration over 34 compute racks, which is why the status is upgraded: TOP500 tracks the expanded Broadwell system as a separate entry and stops listing this one after November 2016. TOP500 is the only source for Rmax, Rpeak, cores and power, 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.
Change history
- 2026-10-02 Added Occigen, the GENCI bullx DLC system at CINES
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 |
|---|---|---|
| cines.fr | names system only | - |
| top500.org | names system and part | Intel Xeon E5-2690 v3, Mellanox InfiniBand FDR |
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.