Supercomputers/Systems/Sango
Japan · operational · hpc
Sango
Also known as OIST Sango
Operated by OIST .
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
- 252.70 TFlop/s
- Rpeak
- 405.70 TFlop/s
- Rmax ÷ Rpeak
- 62.3%
- Cores
- 10,512
- Power
- 78.41 kW
- Per watt
- 3.2 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 | - Supermicro SBI-7228R-T2F blade servers | Supermicro | - | Reported | top500.org |
| Accelerator | - Intel Xeon Phi 7120P coprocessors | Intel | - | Reported | top500.org |
| CPU | - Intel Xeon E5-2680 v3 12C 2.5GHz, two per node, 128GiB per node | Intel | - | Verified | top500.orgarxiv.org |
| Interconnect | Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond InfiniBand FDR 56Gbit/s | NVIDIA | - | Verified | top500.orgarxiv.org |
| Operating system | CentOS Operating systems Linux distribution, RHEL-compatible rebuild · Open source, community-maintained CentOS | The CentOS Project | - | Reported | top500.org |
The read
OIST's university-shared HPC cluster, a Supermicro SBI-7228R-T2F blade system with Xeon E5-2680v3 12C 2.5GHz hosts, Intel Xeon Phi 7120P coprocessors and InfiniBand FDR, running CentOS. TOP500 lists 10,512 cores, Rmax 252.7 and Rpeak 405.7 TFlop/s and 78.41 kW, first appearing in June 2015 at rank 281 and again in November 2015 at rank 403. An OIST simulation paper independently describes Sango as the university-shared cluster whose nodes each have two 12-core 2.5GHz Xeon E5-2680v3 processors with 128GiB of memory on 56Gbit/s InfiniBand FDR. The paper's acknowledgements show the cluster in use in 2016.
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
- 2026-10-09 Added Sango
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 |
|---|---|---|
| arxiv.org | does not name this system | - |
| top500.org | names system and part | Mellanox InfiniBand FDR, CentOS |
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
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.