Germany · operational · hpc

JURECA-DC

Also known as JURECA Data Centric Module

Operated by Forschungszentrum Julich at Julich Supercomputing Centre .

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: 9.33 PFlop/s
Rpeak: -
Rmax ÷ Rpeak: -
Cores: -
Power: 384.1 kW
Per watt: 24.3 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	- BullSequana XH2000	Eviden ATOEPA rolls up to Atos	-	Reported	top500.org
Accelerator	NVIDIA A100 SXM4 40GB Accelerators CUDA (Ampere GA100) · 6,912C · 1.41 GHz · 7 nm · 400 W 192 GPU nodes with four NVIDIA A100 40GB	NVIDIA NVDANASDAQ	768 estimated	Verified	apps.fz-juelich.de top500.org
CPU	AMD EPYC 7742 (Rome) CPUs x86-64 · 64C · 2.25 GHz · 7 nm · 225 W 2 AMD EPYC 7742, 2x 64 cores, 2.25 GHz per node	AMD AMDNASDAQ	-	Verified	apps.fz-juelich.de top500.org
Interconnect	NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds Mellanox InfiniBand HDR network, DragonFly+	NVIDIA NVDANASDAQ	-	Verified	apps.fz-juelich.de top500.org
Storage	IBM Spectrum Scale ESS (GPFS) Storage Parallel filesystem (GPFS), erasure-coded declustered RAID · 250 PB on Summit (Alpine) · About 2.5 TB/s IBM Spectrum Scale (GPFS) parallel file system	IBM IBMNYSE	-	Reported	apps.fz-juelich.de

The read

The data-centric module of Julich's modular JURECA machine: 480 standard and 96 large-memory nodes of two AMD EPYC 7742 CPUs, plus 192 GPU nodes of four NVIDIA A100 each, on InfiniBand HDR. JSC says the first phase ran from 2020 and the full module was available from May 2021; TOP500 first lists it in June 2021 at 43rd and its best rank is that one. JSC quotes a peak of 18.52 PFlop/s including the GPUs and about 98,304 CPU cores, against TOP500's 14.51 PFlop/s and 105,840 cores, so neither peak nor core count is recorded. TOP500 says CentOS where JSC now says Rocky Linux 9, so no OS edge is recorded. JSC's current page also lists 32 H100 nodes reserved for other research groups, which are not counted here. TOP500 is the only source for Rmax, so the tier is reported.

Timeline

2020 First operational source
2021-06 List debut at #43 (June 2021) 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

Julich Supercomputing Centre

Location: Julich, Germany
Cooling: Direct liquid cooling
Commissioned: 2004

fz-juelich.de

Where sources disagree

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

Peak performance: 18.52 PFlop/s including GPUs (JSC) against 14.51 PFlop/s (TOP500). Likely different scopes; no peak is recorded.
Core count: about 98,304 CPU cores (JSC) against 105,840 (TOP500). No core count is recorded.
Operating system: Rocky Linux 9 (JSC) against CentOS (TOP500). TOP500 may be stale; no OS edge is recorded.

Change history

2026-09-22 Gained a Green500 rank pointer (#45 on the 2024-06 list)
2026-09-20 Added with a rank pointer; peak, cores and OS conflicts logged

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
apps.fz-juelich.de	names system, part and count	AMD EPYC 7742 (Rome), NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR, IBM Spectrum Scale ESS (GPFS) · counts: 768
top500.org	names system and part	AMD EPYC 7742 (Rome), NVIDIA A100 SXM4 40GB, NVIDIA InfiniBand HDR

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