CLAIX-2018

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: 2.48 PFlop/s
Rpeak: 4.11 PFlop/s
Rmax ÷ Rpeak: 60.3%
Cores: 61,200
Power: 692.05 kW
Per watt: 3.6 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	- NEC cluster	NEC 6701TSE	-	Reported	top500.org
Accelerator	NVIDIA Tesla V100 Accelerators CUDA (Volta GV100) · 5,120C · 1.53 GHz · 12 nm · 300 W 48 nodes with two NVIDIA Volta V100 GPUs each, NVLink	NVIDIA NVDANASDAQ	96 reported	Reported	itc.rwth-aachen.de
CPU	Intel Xeon Platinum 8160 CPUs x86-64 · 24C · 2.1 GHz · 14 nm · 150 W Xeon Platinum 8160 24C 2.1GHz, 61,200 cores per TOP500	Intel INTCNASDAQ	-	Verified	top500.org itc.rwth-aachen.de
Interconnect	Omni-Path Architecture Interconnect Fat tree · 100 Gb/s per port · About 1 microsecond Intel Omni-Path 100G	Intel INTCNASDAQ	-	Verified	top500.org itc.rwth-aachen.de

The read

RWTH Aachen's NEC-built CLAIX-2018 cluster, 92nd on the June 2019 TOP500 and 51st on the Green500. TOP500 lists 61,200 cores of Xeon Platinum 8160 24-core 2.1 GHz on Intel Omni-Path with 2.48 PFlop/s Rmax and 4.11 PFlop/s Rpeak; the IT Center's own announcement describes around 1,100 nodes with the same CPU, 48 GPU nodes with two NVIDIA Volta V100 each, a 10 PB Lustre system, and a theoretical 3.55 PFlop/s for the second stage, so the peak figures disagree and the TOP500 values are used. RWTH's IT Center blog says CLAIX-2018 reached end of life, with 516 nodes switched off on 3 May 2024 and the rest on 31 May 2024. The later CLAIX-2023 is a separate row.

Timeline

2018 First operational source
2019-06 List debut at #92 (June 2019) source
2024-05 Decommissioned source

Public list appearances

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

#92: TOP500, June 2019 →

Change history

2026-10-02 Added CLAIX-2018, RWTH Aachen

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.

One cited source was readable and does not mention this system; another could not be read because the host returned a bot challenge. The unreadable one may well be fine, so this is weaker evidence than a corroborated row and much stronger than an unsupported one. See how this check works.

Cited source	Result	Found on the page
itc.rwth-aachen.de	could not be fetched	-
top500.org	does not name this system	Intel Xeon Platinum 8160, Omni-Path Architecture · counts: 96

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