Japan · operational · hpc

SQUID

Name: Osaka University D3 Center (SQUID)
Address: Japan

Operated by D3 Center, Osaka University at Osaka University D3 Center (SQUID) .

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: 6.11 PFlop/s
Rpeak: 8.87 PFlop/s
Rmax ÷ Rpeak: 68.9%
Cores: 115,520
Power: 1.22 MW
Per watt: 5.0 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	- NEC	NEC 6701TSE	-	Verified	nec.com top500.org
Accelerator	NVIDIA A100 SXM4 40GB Accelerators CUDA (Ampere GA100) · 6,912C · 1.41 GHz · 7 nm · 400 W 42 nodes of eight NVIDIA A100 SXM4 40GB	NVIDIA NVDANASDAQ	336 estimated	Verified	hpc.cmc.osaka-u.ac.jp nec.com
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Mellanox InfiniBand HDR 200 Gbps	NVIDIA NVDANASDAQ	-	Verified	hpc.cmc.osaka-u.ac.jp nec.com
Storage	DDN EXAScaler Storage Lustre appliance DDN EXAScaler Lustre, 20 PB HDD and 1.2 PB NVMe	DDN	-	Verified	hpc.cmc.osaka-u.ac.jp nec.com
Operating system	CentOS Operating systems Linux distribution, RHEL-compatible rebuild · Open source, community-maintained CentOS	The CentOS Project IBMNYSE rolls up to IBM	-	Reported	top500.org

The read

Osaka University's NEC system of 1,520 Xeon Ice Lake nodes, 42 nodes of eight NVIDIA A100 and 36 nodes of NEC vector engines on HDR InfiniBand, in service from May 2021 (the D3 centre's page gives both 1 and 6 May; NEC says May). TOP500's row covers the CPU nodes only, 67th in June 2021, while the whole system peaks at 16.6 PFlop/s per the centre, so the figures here are the CPU partition's. The city is not stated, so no coordinates are recorded. Service is scheduled to end in June 2027.

Timeline

2020-12 Announced source
2021-05 First operational source
2021-06 List debut at #67 (June 2021) 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

Osaka University D3 Center (SQUID)

Location: Japan
Commissioned: 2021

hpc.cmc.osaka-u.ac.jp

Where sources disagree

We record conflicts instead of picking a winner quietly. All open questions.

Start of service: 1 May 2021 (D3 page) against 6 May 2021 (same page, news item). Only the month is recorded.

Change history

2026-09-22 Gained a Green500 rank pointer (#159 on the 2025-06 list)
2026-09-20 Added; TOP500 lists only its CPU partition

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
nec.com	names system and part	NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR
top500.org	names system and part	NVIDIA InfiniBand HDR, CentOS

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