Supercomputers/Systems/ISSP SR8000-F1/60
Japan · decommissioned · hpc
ISSP SR8000-F1/60
Also known as Hitachi SR8000/60 model F1 (icho) at ISSP
Operated by ISSP Supercomputer Center at ISSP Supercomputer Center .
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
- 577.0 GFlop/s
- Rpeak
- 720.0 GFlop/s
- Rmax ÷ Rpeak
- 80.1%
- Cores
- 60
- 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 | - Hitachi built the SR8000/60 model F1 | Hitachi | - | Reported | scc.issp.u-tokyo.ac.jptop500.org |
| Operating system | Hitachi HI-UX/MPP Operating systems Unix (Mach 3.0 microkernel), Hitachi-customised · Proprietary Hitachi HI-UX/MPP operating system | Hitachi | - | Reported | top500.org |
The read
System A of the second-period supercomputer at the University of Tokyo's Institute for Solid State Physics: a Hitachi SR8000/60 model F1 named icho, with 640 GB of memory and 720 GFlop/s, paired with an SGI 2800/384 Origin2000 as System B. ISSP's past-systems page dates the second period March 2000 to March 2005. TOP500 lists 60 nodes at 720 GFlop/s Rpeak and 577 GFlop/s Rmax under HI-UX/MPP, 17th on the June 2000 list and last at rank 271 in November 2003 (https://www.top500.org/system/170752/). TOP500 is the only source for Rmax, so the tier is reported.
Timeline
- 2000-03 First operational source
- 2000-06 List debut at #17 (June 2000) source
- 2005-03 Decommissioned 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
Change history
- 2026-10-09 Added ISSP SR8000-F1/60
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 |
|---|---|---|
| scc.issp.u-tokyo.ac.jp | does not name this system | Hitachi HI-UX/MPP |
| top500.org | names system and part | Hitachi HI-UX/MPP |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.