Poland · operational · mixed

Athena

Operated by Cyfronet AGH at Cyfronet AGH, Krakow .

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: 5.05 PFlop/s
Rpeak: 7.71 PFlop/s
Rmax ÷ Rpeak: 65.5%
Cores: 47,616
Power: 146.56 kW
Per watt: 34.5 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	- FormatServer THOR ERG21, 48 dual-socket nodes	Format	-	Reported	top500.org
Accelerator	NVIDIA A100 SXM4 40GB Accelerators CUDA (Ampere GA100) · 6,912C · 1.41 GHz · 7 nm · 400 W 384 NVIDIA A100 SXM4 40GB GPUs	NVIDIA NVDANASDAQ	384 reported	Verified	top500.org oferta-badawcza.agh.edu.pl
CPU	AMD EPYC 7742 (Rome) CPUs x86-64 · 64C · 2.25 GHz · 7 nm · 225 W 48 servers, two AMD EPYC 7742 64C 2.25GHz each	AMD AMDNASDAQ	96 estimated	Verified	top500.org oferta-badawcza.agh.edu.pl
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds InfiniBand HDR, 4x200 Gb/s per server	NVIDIA NVDANASDAQ	-	Verified	top500.org oferta-badawcza.agh.edu.pl
Operating system	CentOS Operating systems Linux distribution, RHEL-compatible rebuild · Open source, community-maintained CentOS	The CentOS Project IBMNYSE rolls up to IBM	-	Reported	top500.org

AI datacenter metrics

Figures beyond an accelerator count, each with who stated it. What can and cannot be compared across AI datacenters.

Metric	Value	As of	Basis	Note	Source
Accelerators	384 accelerators	2026-10	Operator stated	384 NVIDIA A100 cards across 48 servers per Cyfronet.	cyfronet.pl

The read

Cyfronet AGH's Krakow system, 48 dual-socket FormatServer THOR ERG21 nodes paired with 384 NVIDIA A100 40GB GPUs, installed in 2021 and formally inaugurated on 4 October 2022; briefly Poland's fastest machine before Cyfronet's own Helios. AGH's own equipment page, TOP500 and Polish trade outlets (DCD, ITReseller) independently agree on 48 servers and 384 A100s, so the CPU and accelerator edges are verified; TOP500 names Format as manufacturer with no independent statement found, so that edge and all quantitative figures stay reported. AGH's page states 6,144 CPU cores, which conflicts with TOP500's own 47,616 total core count for the same system; TOP500's figure is used here and the conflict is logged rather than resolved. TOP500 is the only source for Rmax, Rpeak and core count, so the tier is reported.

Timeline

2021 First operational source
2022-06 List debut at #105 (June 2022) source

Public list appearances

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

#105: TOP500, June 2022 →

Site & facility

Cyfronet AGH, Krakow

Location: Krakow, Poland
Commissioned: 2021

oferta-badawcza.agh.edu.pl top500.org

Where sources disagree

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

Core count: 6,144 CPU cores (AGH equipment page) against 47,616 total cores (TOP500). TOP500's figure is used; AGH's 6,144 appears to count only the AMD EPYC CPU cores, not whatever TOP500 aggregates into its own core count.

Change history

2026-10-04 Added AI datacenter metrics for athena
2026-09-23 Added; a new operator (Cyfronet AGH) and a new integrator (Format) joined the taxonomy, and its core count conflicts with TOP500

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
oferta-badawcza.agh.edu.pl	names system, part and count	AMD EPYC 7742 (Rome), NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR · counts: 384
top500.org	names system, part and count	AMD EPYC 7742 (Rome), NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR, CentOS · counts: 96

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