Grand Chariot 2

Operated by IIC, Hokkaido University at Hokkaido University Sapporo Campus .

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: 4.38 PFlop/s
Rpeak: 6.55 PFlop/s
Rmax ÷ Rpeak: 66.9%
Cores: 14,208
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	- Fujitsu PRIMERGY CX400 CPU nodes and GX2560 M7 GPU nodes	Fujitsu 6702TSE	-	Reported	top500.org hucc.hokudai.ac.jp
Accelerator	- NVIDIA H100 80GB HBM3, four per node on 24 GPU nodes	NVIDIA NVDANASDAQ	96 estimated	Reported	hucc.hokudai.ac.jp top500.org
CPU	Intel Xeon Gold 6548Y+ CPUs x86-64 · 32C · 2.5 GHz · Intel 7 · 250 W Intel Xeon Gold 6548Y+ 32C 2.5GHz, two per node, 480 CPU nodes plus 24 GPU nodes	Intel INTCNASDAQ	-	Reported	hucc.hokudai.ac.jp top500.org
Interconnect	NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds InfiniBand NDR, one 400 Gbps link per CPU node and two per GPU node	NVIDIA NVDANASDAQ	-	Reported	hucc.hokudai.ac.jp top500.org
Storage	DDN EXAScaler Storage Lustre appliance DDN ES400NVX2 all-flash, 16.95 PB, EXAScaler Lustre	DDN	-	Reported	hucc.hokudai.ac.jp

The read

Hokkaido University's Fujitsu system for the Interdisciplinary Large-scale Computing System: 480 CPU nodes with two Intel Xeon Gold 6548Y+ processors (64 cores) and 512 GiB each, plus 24 GPU nodes each with four NVIDIA H100 80GB GPUs, on InfiniBand NDR, with a 16.95 PB all-flash DDN EXAScaler Lustre store. Hokkaido states 2.45 PFlop/s for the CPU nodes and 267.6 TFlop/s per GPU node. TOP500 lists it with 14,208 cores, Rmax 4.38 and Rpeak 6.55 PFlop/s, so its run covers a subset of the machine; it first appeared 264th in June 2025 and was 294th in November 2025. TOP500 gives no power figure and Hokkaido's page gives no start date, so both are blank. TOP500 and Hokkaido agree on the processor, GPU and fabric but not on scale, so the tier is reported.

Timeline

2025-11 List debut at #294 (November 2025) source

Public list appearances

Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.

#294: TOP500, November 2025 →

Site & facility

Hokkaido University Sapporo Campus

Location: Sapporo, Japan

top500.org hucc.hokudai.ac.jp

Change history

2026-10-02 Grand Chariot 2 added, from TOP500 and Hokkaido University

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	Intel Xeon Gold 6548Y+, NVIDIA InfiniBand NDR (Quantum-2)
hucc.hokudai.ac.jp	names system and part	Intel Xeon Gold 6548Y+, NVIDIA InfiniBand NDR (Quantum-2)

Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.