COMPUTE ATLAS Supercomputer supply-chain graph
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Supercomputers/Systems/OpenCanvas GPUaaS SP1

Japan · operational · ai training

OpenCanvas GPUaaS SP1

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Also known as NTT DATA OpenCanvas GPUaaS SP1

Operated by NTT DATA Japan .

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
17.53 PFlop/s
HPL measured
Rpeak
19.24 PFlop/s
Rmax ÷ Rpeak
91.1%
Cores
81,648
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 B200 SuperPOD (manufacturer listed as Nvidia)
 NVIDIA
NVDANASDAQ
- Verified top500.orgnttdata.com
Accelerator NVIDIA B200 SXM
Accelerators
CUDA (Blackwell) · TSMC 4NP · 1,000 W
NVIDIA B200 SXM 180GB, eight per DGX B200
 NVIDIA
NVDANASDAQ
- Verified top500.orgnttdata.com
CPU Intel Xeon Platinum 8570
CPUs
x86-64 · 56C · 2.1 GHz · Intel 7
Intel Xeon Platinum 8570 56C 2.1GHz
 Intel
INTCNASDAQ
- 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 Quantum-2)
 NVIDIA
NVDANASDAQ
- Verified top500.orgnttdata.com
Operating system Ubuntu Server
Operating systems
Linux distribution · Open source, free with paid support tiers
Ubuntu 24.04.2 LTS
 Canonical
- Reported top500.org

The read

NTT DATA Japan's private-cloud GPU-as-a-service platform for large-scale machine learning, built as an NVIDIA DGX SuperPOD of DGX B200 systems (eight Blackwell GPUs each) joined by NVIDIA Quantum-2 InfiniBand. NTT DATA's own pages state a service launch in October 2025 in Japanese data centers and, in its SC25 announcement of 19 November 2025, an HPL result of 17.5 PFlop/s against 19.2 PFlop/s theoretical; TOP500 lists the same system with Intel Xeon Platinum 8570 hosts, 81,648 cores, Rmax 17.53 and Rpeak 19.24 PFlop/s at rank 105 on November 2025 and rank 124 on June 2026. The data center is not named and no GPU count is published.

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

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 sourceResultFound on the page
top500.orgnames system and partNVIDIA B200 SXM, Intel Xeon Platinum 8570, NVIDIA InfiniBand NDR (Quantum-2), Ubuntu Server
nttdata.comnames system and partNVIDIA B200 SXM, NVIDIA InfiniBand NDR (Quantum-2)

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

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.