ECMWF VPP5000/100

Also known as Fujitsu VPP5000 at ECMWF

Operated by ECMWF at ECMWF Data Centre (Reading) .

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: 886.0 GFlop/s
Rpeak: 960.0 GFlop/s
Rmax ÷ Rpeak: 92.3%
Cores: 100
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 VPP5000/100	Fujitsu 6702TSE	-	Verified	top500.org events.ecmwf.int
CPU	- 100 VPP5000 vector processing elements	Fujitsu 6702TSE	100 reported	Verified	top500.org events.ecmwf.int
Interconnect	- Full distributed crossbar	Fujitsu 6702TSE	-	Reported	top500.org
Operating system	Fujitsu UXP Operating systems Unix (SVR4-derived), Fujitsu-customised · Proprietary UXP/V	Fujitsu 6702TSE	-	Reported	top500.org

The read

The Fujitsu VPP5000 vector-parallel system that ECMWF installed in 1999 with 38 processors and extended to 100 processing elements in 2000, replacing its VPP700. ECMWF's own computing history gives 9.6 GFlop/s peak per processor, and TOP500 lists 100 cores at 300 MHz on a full distributed crossbar under UXP/V, 886 GFlop/s Rmax and 960 GFlop/s peak, twelfth on the November 2000 list and listed through November 2002. TOP500 is the only source for Rmax, so the tier is reported.

Timeline

2000 First operational source
2000-11 List debut at #12 (November 2000) source

Public list appearances

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

#12: TOP500, November 2000 →

Site & facility

ECMWF Data Centre (Reading)

Location: Reading, United Kingdom

top500.org confluence.ecmwf.int

Change history

2026-10-02 Added ECMWF's Fujitsu VPP5000/100, twelfth on the November 2000 TOP500

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
events.ecmwf.int	names system only	-
top500.org	names system only	-

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