Supercomputers/Systems/Constance
USA · operational · hpc
Constance
Also known as PNNL Institutional Computing Constance
Operated by Pacific Northwest National Laboratory .
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: 1263 of 1345 systems have a readable citation that names them, and 56 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
- 203.24 TFlop/s
- Rpeak
- 264.96 TFlop/s
- Rmax ÷ Rpeak
- 76.7%
- Cores
- 7,200
- 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 | - Atipa cluster of Supermicro SuperServer 6028TP-HTFR nodes | Atipa Technologies | - | Reported | top500.orgweb.archive.org |
| CPU | - Intel Xeon E5-2670v3 12C 2.3GHz | Intel | - | Reported | top500.orgweb.archive.org |
| Interconnect | Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond InfiniBand FDR | NVIDIA | - | Reported | top500.orgweb.archive.org |
The read
Supermicro-based cluster built by Atipa for PNNL Institutional Computing (PIC) at Pacific Northwest National Laboratory. TOP500 lists Supermicro SuperServer 6028TP-HTFR nodes with Xeon E5-2670v3 12C 2.3GHz processors on InfiniBand FDR running Linux, 7,200 cores, Rmax 203.24 TFlop/s and Rpeak 264.96 TFlop/s; it first appeared 297th on the November 2014 list and was last listed 371st in June 2015. The PIC home page, captured by the Internet Archive in 2015, announces Constance as PIC's new supercomputing system with a downloadable announcement; the page gives no hardware figures, so the tier is reported.
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 Constance
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 |
|---|---|---|
| web.archive.org | names system only | - |
| top500.org | names system and part | Mellanox InfiniBand FDR |
Checked 2026-10-13 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.