Germany · decommissioned · hpc

JURECA

Also known as JURECA Cluster Module (2015)

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: 1.42 PFlop/s
Rpeak: 1.69 PFlop/s
Rmax ÷ Rpeak: 84.0%
Cores: -
Power: 828.55 kW
Per watt: 1.7 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	- T-Platforms V-Class blades	T-Platforms	-	Reported	top500.org apps.fz-juelich.de
Accelerator	- NVIDIA K80 GPUs in 75 nodes (two per node)	NVIDIA NVDANASDAQ	-	Reported	apps.fz-juelich.de
CPU	- Two Intel Xeon E5-2680 v3 Haswell 12-core 2.5 GHz CPUs per node	Intel INTCNASDAQ	-	Reported	apps.fz-juelich.de
Interconnect	- Mellanox EDR InfiniBand, non-blocking fat tree	Mellanox NVDANASDAQ rolls up to NVIDIA	-	Reported	apps.fz-juelich.de

The read

The original 2015 cluster module of Julich's JURECA, built by T-Platforms from V-Class blades: 1,872 nodes of two Xeon E5-2680 v3 12-core CPUs each, 75 of them with two NVIDIA K80 GPUs, on Mellanox EDR InfiniBand, with a 1.8 petaflop CPU peak plus 0.44 petaflop from the GPUs per JSC. TOP500 lists this configuration at 1.42 petaflops Rmax and 1.69 petaflops Rpeak, 50th on the November 2015 list; the later TOP500 entries include the 2017 Booster module and are not recorded here. JSC says the cluster module was retired in 2020 and replaced by JURECA-DC. JSC counts 45,216 CPU cores against TOP500's 49,476, and its peak differs from TOP500's, so no core count is recorded. TOP500 is the only source for Rmax, so the tier is reported.

Timeline

2015 First operational source
2015-11 List debut at #50 (November 2015) source
2020 Decommissioned source

Public list appearances

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

#50: TOP500, November 2015 →

Site & facility

Julich Supercomputing Centre

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

fz-juelich.de

Change history

2026-10-02 Added the original JURECA cluster module at Julich

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 only	-
top500.org	names system only	-

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