USA · operational · mixed

Polaris

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: 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: 25.81 PFlop/s
Rpeak: 34.16 PFlop/s
Rmax ÷ Rpeak: 75.6%
Cores: 256,592
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	- Apollo 6500	Hewlett Packard Enterprise HPENYSE	-	Reported	top500.org
Accelerator	NVIDIA A100 SXM4 40GB Accelerators CUDA (Ampere GA100) · 6,912C · 1.41 GHz · 7 nm · 400 W NVIDIA A100 SXM4 40 GB	NVIDIA NVDANASDAQ	-	Reported	top500.org
CPU	AMD EPYC 7532 CPUs x86-64 · 32C · 2.4 GHz · 7 nm · 200 W AMD EPYC 7532 32C 2.4GHz	AMD AMDNASDAQ	-	Reported	top500.org
Interconnect	HPE Slingshot-10 Interconnect Dragonfly · 100 Gb/s per port Slingshot-10	Hewlett Packard Enterprise HPENYSE	-	Reported	top500.org
Operating system	SUSE Linux Enterprise Server Operating systems Linux distribution · Open source, commercial support subscription SLES15 SP2	SUSE	-	Reported	top500.org

The read

A DOE/SC pre-exascale testbed at Argonne's ALCF (HPE Apollo 6500, EPYC 7532 hosts, NVIDIA A100 SXM4 40GB, Slingshot-10), online since 2021. ALCF's own pages were unreachable from this pass (connection-level blocks, not merely bot filtering), flagged as an access limitation rather than a sourcing gap, so all facts here rest on TOP500 alone pending a future pass with different network access. NVIDIA independently confirms ALCF hosting, HPE as builder and 560 nodes with four A100 each, and AMD independently confirms 2nd Gen EPYC. Rmax, Rpeak and core count still rest on TOP500 alone, and NVIDIA's roughly 44 PFlop/s FP64 peak describes the announced full system, not the ranked run, so the tier stays reported.

Timeline

2021 First operational source
2026-06 List debut at #83 (June 2026) source

Public list appearances

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

#83: TOP500, June 2026 →

Site & facility

Argonne Leadership Computing Facility

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

alcf.anl.gov anl.gov

Where sources disagree

We record conflicts instead of picking a winner quietly. All open questions.

Peak performance: 34.16 PFlop/s (ranked run) against About 44 PFlop/s FP64 (announced full system). Probably different scopes: the announced system versus the run TOP500 measured.

Change history

2026-09-19 Second source added for the hardware; performance figures still rest on TOP500 alone

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
nvidianews.nvidia.com	names system and part	NVIDIA A100 SXM4 40GB
top500.org	names system and part	AMD EPYC 7532, NVIDIA A100 SXM4 40GB, HPE Slingshot-10

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