Germany · operational · mixed

Capella

Operated by TU Dresden at TU Dresden ZIH .

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: 24.06 PFlop/s
Rpeak: 37.67 PFlop/s
Rmax ÷ Rpeak: 63.9%
Cores: 85,248
Power: 444.79 kW
Per watt: 54.1 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	- Lenovo ThinkSystem SD665-N V3	Lenovo 992HKEX	-	Verified	top500.org compendium.hpc.tu-dresden.de
Accelerator	NVIDIA H100 SXM5 94GB Accelerators CUDA (Hopper GH100) · 16,896C · 1.98 GHz · TSMC 4N · 700 W Nvidia H100 SXM5 94Gb	NVIDIA NVDANASDAQ	-	Verified	top500.org compendium.hpc.tu-dresden.de
CPU	AMD EPYC 9004 (Genoa) CPUs x86-64 · 96C · 2.4 GHz · TSMC N5 · 360 W AMD EPYC 9334 32C 2.7GHz	AMD AMDNASDAQ	-	Verified	top500.org compendium.hpc.tu-dresden.de
Interconnect	NVIDIA InfiniBand NDR (Quantum-2) Interconnect Fat tree or dragonfly+ · 400 Gb/s per port · Under 0.6 microseconds Infiniband NDR200	NVIDIA NVDANASDAQ	-	Reported	top500.org

The read

A Lenovo ThinkSystem SD665-N V3 / EPYC 9334 / H100 SXM5 cluster at TU Dresden's ZIH center. ZIH's own compendium page independently confirms the exact CPU and GPU model numbers (including the 94GB H100 variant already recorded for TSUBAME4.0) but not an exact Rmax/Rpeak/power/core figure, and states the production OS as Rocky Linux 9.6 where TOP500's own listing names AlmaLinux 9.4 for the benchmark run, a discrepancy flagged rather than silently resolved, which is why no OS component row is recorded for this system.

Timeline

2024-11 List debut at #5 (November 2024) source
2024-11 First operational source

Public list appearances

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

Site & facility

TU Dresden ZIH

Location: Dresden, Germany
Commissioned: 2024

tu-dresden.de

Where sources disagree

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

Operating system: AlmaLinux 9.4 (TOP500) against Rocky Linux 9.6 (TU Dresden ZIH). Possibly a benchmark image versus production; no OS edge is recorded.

Change history

2026-09-22 Gained a Green500 rank pointer (#5 on the 2024-11 list)

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
compendium.hpc.tu-dresden.de	names system and part	AMD EPYC 9004 (Genoa), NVIDIA H100 SXM5 94GB, NVIDIA InfiniBand NDR (Quantum-2)
top500.org	names system and part	AMD EPYC 9004 (Genoa), NVIDIA H100 SXM5 94GB, NVIDIA InfiniBand NDR (Quantum-2)

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