USA · operational · hpc

Cooley

Also known as ALCF visualization cluster

Operated by Argonne National Laboratory at Argonne Leadership Computing Facility .

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: 240.40 TFlop/s
Rpeak: 293.72 TFlop/s
Rmax ÷ Rpeak: 81.8%
Cores: 4,788
Power: 93.91 kW
Per watt: 2.6 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	- Cray CS300-AC cluster (TOP500 manufacturer: Cray/HPE)	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org web.archive.org
Accelerator	- NVIDIA Tesla K80, one per node, 126 nodes	NVIDIA NVDANASDAQ	126 reported	Reported	web.archive.org top500.org
CPU	- Intel Xeon E5-2620 6-core 2.4 GHz, two per node, 126 nodes	Intel INTCNASDAQ	252 reported	Reported	web.archive.org top500.org
Interconnect	Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond FDR InfiniBand network	Mellanox NVDANASDAQ rolls up to NVIDIA	-	Reported	web.archive.org top500.org
Operating system	Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription Red Hat Enterprise Linux 6.5	Red Hat IBMNYSE rolls up to IBM	-	Reported	top500.org

The read

Cooley, the Argonne Leadership Computing Facility's GPU visualization and analysis cluster. ALCF's page describes 126 nodes, each with two 6-core 2.4 GHz Intel E5-2620 processors and one NVIDIA Tesla K80, 1,512 CPU cores, 47 TB of memory, 3 TB of GPU memory, FDR InfiniBand, six racks and 293 teraflops peak. TOP500 lists the Cray CS300-AC at 4,788 cores (a count that includes GPU cores), 240.4 TFlop/s Rmax, 293.72 TFlop/s Rpeak and 93.91 kW on Red Hat Enterprise Linux 6.5, ranked 298th in June 2015 and 425th in November 2015. The archived ALCF page still described Cooley after the SC19 conference in November 2019, which is the last evidence of service used here.

Timeline

2015 First operational source
2015-06 List debut at #298 (June 2015) source

Public list appearances

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

#298: TOP500, June 2015 →

Site & facility

Argonne Leadership Computing Facility

Location: Lemont, IL, USA
Cooling: Direct liquid cooling (warm water)
Commissioned: 2006

alcf.anl.gov anl.gov

Change history

2026-10-09 Added Cooley

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 and part	Mellanox InfiniBand FDR
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.