USA · decommissioned · hpc

Stampede

Operated by Texas Advanced Computing Center at Texas Advanced Computing 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: 5.17 PFlop/s
Rpeak: 9.60 PFlop/s
Rmax ÷ Rpeak: 53.8%
Cores: 522,080
Power: 4.51 MW
Per watt: 1.1 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 C8220 / C8220X	Dell Technologies DELLNYSE	-	Verified	datacenterknowledge.com top500.org
Accelerator	Intel Xeon Phi SE10P Accelerators x86-64 (Knights Corner) · 61C Intel Xeon Phi SE10P coprocessors	Intel INTCNASDAQ	6,880 reported	Reported	datacenterknowledge.com top500.org
CPU	Intel Xeon E5-2680 CPUs x86-64 · 8C · 2.7 GHz · 32 nm · 130 W Xeon E5-2680 8C 2.700GHz, two per node	Intel INTCNASDAQ	12,800 reported	Verified	datacenterknowledge.com top500.org
Interconnect	Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond 56 Gb/s FDR InfiniBand	Mellanox NVDANASDAQ rolls up to NVIDIA	-	Verified	datacenterknowledge.com top500.org

The read

NSF announced the $27.5 million initial grant for Stampede to the University of Texas at Austin's Texas Advanced Computing Center (TACC) on 22 September 2011; the system, built by Dell on PowerEdge C8220/C8220X nodes with dual Intel Xeon E5-2680 processors and Mellanox FDR InfiniBand, began operating 7 January 2013 and was formally dedicated 28 March 2013. It debuted on the November 2012 TOP500 list at rank 7 with 2.66 PFlop/s (Xeon-only, pre-accelerator), then moved up to its best-ever rank of 6 on the June 2013 list once Intel Xeon Phi SE10P coprocessors were fully deployed, reaching the 5.16811 PFlop/s Rmax and 9.59821 PFlop/s Rpeak recorded here; that is the edition this row's list_appearances pointer targets. NVIDIA GPUs were also present for remote visualization but are not recorded as a compute-accelerator edge. Superseded by Stampede2 (2017) and Stampede3 (2024), both already in this dataset.

Timeline

2011-09 Announced source
2013-01 First operational source
2013-06 List debut at #6 (June 2013) source

Public list appearances

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

#6: TOP500, June 2013 →

Site & facility

Texas Advanced Computing Center

Location: Austin, TX, USA
Cooling: Direct liquid cooling
Commissioned: 2007

tacc.utexas.edu

Change history

2026-09-24 Stampede added

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 and part	Intel Xeon E5-2680, Intel Xeon Phi SE10P, Mellanox InfiniBand FDR
datacenterknowledge.com	names system, part and count	Intel Xeon E5-2680, Intel Xeon Phi SE10P, Mellanox InfiniBand FDR · counts: 6880

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