Supercomputers/Systems/Spartan2
France · operational · hpc
Spartan2
Also known as Atos Spartan2
Operated by Atos .
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
- 2.57 PFlop/s
- Rpeak
- 3.85 PFlop/s
- Rmax ÷ Rpeak
- 66.8%
- Cores
- 23,040
- Power
- 105.76 kW
- Per watt
- 24.3 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 Sequana XH2000 | Bull | - | Reported | top500.orgtop500.org |
| Accelerator | - NVIDIA A100 GPUs | NVIDIA | - | Reported | top500.org |
| CPU | AMD EPYC 7402 (Rome) CPUs x86-64 · 24C · 2.8 GHz · 7 nm · 180 W AMD EPYC 7402 24C 2.8GHz | AMD | - | Reported | top500.org |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Mellanox HDR Infiniband | NVIDIA | - | Reported | top500.org |
The read
BullSequana XH2000 system listed by TOP500 at Atos with AMD EPYC 7402 24C 2.8GHz processors, NVIDIA A100 GPUs and Mellanox HDR Infiniband (23,040 cores). It ranked fourth on the November 2020 Green500 at 24.262 GFlops/Watt (2.57 PFlop/s Rmax on 105.76 kW; TOP500 rank 146) and has stayed on the TOP500 with the same figures, last seen in June 2025.
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
- 2026-10-07 Added Spartan2
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 | AMD EPYC 7402 (Rome), NVIDIA InfiniBand HDR |
| top500.org | names system and part | AMD EPYC 7402 (Rome), 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.