Supercomputers/Systems/Tera-1000-1
France · operational · hpc
Tera-1000-1
Also known as CEA Tera-1000 phase 1 Xeon system
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
- 1.87 PFlop/s
- Rpeak
- 2.59 PFlop/s
- Rmax ÷ Rpeak
- 72.2%
- Cores
- 70,272
- Power
- 1.04 MW
- Per watt
- 1.8 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 720 (Atos) | Eviden | - | Reported | top500.orgteratec.eu |
| CPU | Intel Xeon E5-2698 v3 CPUs x86-64 · 16C · 2.3 GHz · 22 nm · 135 W Xeon E5-2698v3 16C 2.3GHz | 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
CEA's first Tera-1000 compute system at its DAM centre near Paris, a Bull/Atos bullx DLC 720 machine of Xeon E5-2698v3 16-core processors on InfiniBand FDR running Bullx Linux. TOP500 lists 70,272 cores, 1.87 PFlop/s Rmax, 2.59 PFlop/s peak and 1,042 kW, ranking it 45th in June 2016 and still listed at 457th in November 2022. Teratec's account says the Atos-installed first phase, completed on 4 December 2015, had two compute systems, this Xeon E5 v3 one and a Sequana X1000 pre-production Xeon Phi one, ahead of the 25 PFlop/s second phase. TOP500 is the only source for the core count and Rmax, so the tier is reported; the status date is the last TOP500 listing.
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 Tera-1000-1, CEA
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 |
|---|---|---|
| teratec.eu | does not name this system | Intel Xeon E5-2698 v3 |
| top500.org | names system and part | Intel Xeon E5-2698 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.