Supercomputers/Systems/Toyota CRDL SX-4/20
Japan · operational · hpc
Toyota CRDL SX-4/20
Also known as Toyota Central R&D Labs NEC SX-4/20
Operated by Toyota Central R&D Labs .
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
- 38.7 GFlop/s
- Rpeak
- 40.0 GFlop/s
- Rmax ÷ Rpeak
- 96.7%
- Cores
- 20
- 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 | - NEC SX-4/20 vector supercomputer, 20 processors, multi-stage crossbar | NEC | - | Reported | top500.org |
| CPU | - NEC 250MHz vector processors | NEC | - | Reported | top500.org |
The read
Toyota Central Research & Development's NEC SX-4/20, a 20-processor vector supercomputer on a multi-stage crossbar running EWS-UX/V, at 38.7 GFlop/s Rmax and 40 GFlop/s Rpeak. It entered the TOP500 at rank 27 in June 1996, then ranked 43, 67, 83, 133, 164 and 222 before its last appearance at rank 405 in November 1999. It succeeded a single-processor SX-3/14R listed in 1992. The site page gives Japan but no city, so the system is left unlocated. Status is recorded as of the last list appearance.
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
- 2026-10-02 Added Toyota Central R&D Labs' NEC SX-4/20
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 only | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.