Supercomputers/Systems/Topdawg
USA · operational · hpc
Topdawg
Also known as OSCER Dell Xeon64 cluster; Topdawg (University of Oklahoma)
Operated by University of Oklahoma .
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
- 5.44 TFlop/s
- Rpeak
- 6.55 TFlop/s
- Rmax ÷ Rpeak
- 83.1%
- Cores
- 1,024
- 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 | - Dell PowerEdge 1850 cluster, 512 nodes | Dell Technologies | - | Reported | top500.org |
| CPU | - Intel Xeon EM64T 3.2 GHz, 1,024 processors | Intel | 1,024 reported | Reported | top500.org |
The read
Dell PowerEdge 1850 cluster at the University of Oklahoma's OSCER, installed in 2005. TOP500 lists 1,024 Xeon EM64T 3.2 GHz cores on InfiniBand running Linux at 5.44 TFlop/s Rmax and 6.55 TFlop/s Rpeak. OSCER's own Condor Week 2006 slides describe a Dell Xeon64 cluster of 512 nodes with 1,024 Xeon CPUs on InfiniBand and Gigabit Ethernet, 6.5 TFlop/s peak, running Red Hat Enterprise Linux with LSF as the usual scheduler and Condor for emergency work, and say it debuted at number 54 worldwide. TOP500 ranks it 54th in June 2005, then 66th, 88th, 123rd and 290th, with its last appearance in June 2007.
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 Topdawg
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 |
|---|---|---|
| research.cs.wisc.edu | does not name this system | - |
| top500.org | names system only | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.