Japan · operational · hpc

AFI-NITY

Also known as Integrated Supercomputation System

Operated by Institute of Fluid Science, Tohoku University at Tohoku IFS Sendai .

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: 1.69 PFlop/s
Rpeak: 2.70 PFlop/s
Rmax ÷ Rpeak: 62.6%
Cores: 35,200
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 CX2550 M4	Fujitsu 6702TSE	-	Reported	top500.org ifs.tohoku.ac.jp
CPU	Intel Xeon Gold 6148 CPUs x86-64 · 20C · 2.4 GHz · 14 nm · 150 W Intel Xeon Gold 6148 20C 2.4GHz, 35,200 cores	Intel INTCNASDAQ	1,760 estimated	Reported	top500.org
Interconnect	Mellanox InfiniBand EDR Interconnect Fat tree · 100 Gb/s per 4x port · About 0.9 microseconds InfiniBand EDR	NVIDIA NVDANASDAQ	-	Reported	top500.org ifs.tohoku.ac.jp

The read

AFI-NITY is the Fujitsu PRIMERGY CX2550 M4 part (Xeon Gold 6148 20C 2.4GHz, InfiniBand EDR) of the Institute of Fluid Science Integrated Supercomputation System at Tohoku University, ranked 126th on the November 2018 TOP500 with 35,200 cores, 1.69 PFlop/s Rmax and 2.70 PFlop/s Rpeak and still listed in November 2021 and June 2022 (last at 469th). The institute says the system was updated in August 2018 with Fujitsu PRIMERGY servers for a total peak of 3.7 PFLOPS including the shared-memory vSMP system; Fujitsu's November 2017 order announcement put the planned peak at more than 2.7 petaflops. TOP500 is the only source for the core count and Rmax.

Timeline

2018-08 First operational source
2018-11 List debut at #126 (November 2018) source

Public list appearances

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

#126: TOP500, November 2018 →

Site & facility

Tohoku IFS Sendai

Location: Sendai, Japan

info.archives.global.fujitsu

Change history

2026-10-07 Added AFI-NITY, a mid-list TOP500 system (2018-11 126)

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 6148, Mellanox InfiniBand EDR
ifs.tohoku.ac.jp	names system and part	Mellanox InfiniBand EDR

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