Supercomputers/Systems/CHIE-2
Japan · operational · ai training
CHIE-2
Operated by SoftBank Corp. at SoftBank Corp. (undisclosed site) .
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
- 89.78 PFlop/s
- Rpeak
- 138.3 PFlop/s
- Rmax ÷ Rpeak
- 64.9%
- Cores
- 297,840
- Power
- -
- Per watt
- - 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 | - NVIDIA DGX H100 | NVIDIA | - | Reported | top500.org |
| Accelerator | NVIDIA H100 SXM5 Accelerators CUDA (Hopper GH100) · 16,896C · 1.98 GHz · TSMC 4N · 700 W NVIDIA H100 (DGX H100, ~4,000 GPUs) | NVIDIA | - | Reported | top500.orgsoftbank.jp |
| CPU | Intel Xeon Platinum 8480C CPUs x86-64 · 56C · 2 GHz · Intel 7 · 350 W Xeon Platinum 8480C 56C 2GHz | Intel | - | Reported | top500.org |
| Interconnect | NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds Infiniband NDR400 | NVIDIA | - | Reported | top500.org |
The read
The second generation of SoftBank's CHIE AI-computing program, used first to train its SB Intuitions subsidiary's Sarashina Japanese-language model before capacity was offered as commercial GPU cloud. TOP500 and SoftBank's own release trace to the same underlying submission rather than being independently corroborating, so this row is reported rather than verified despite appearing in two places.
Timeline
- 2024-10 Announced source
- 2024-10 First operational source
- 2026-06 List debut at #30 (June 2026) source
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 H100 SXM5, Intel Xeon Platinum 8480C, NVIDIA InfiniBand NDR (Quantum-2) |
| softbank.jp | does not name this system | - |
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.