Germany · decommissioned · hpc

Hermit

Also known as Cray XE6 at HLRS

Operated by HLRS at HLRS, University of Stuttgart .

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: 831.40 TFlop/s
Rpeak: 1.04 PFlop/s
Rmax ÷ Rpeak: 79.6%
Cores: 113,472
Power: -
Per watt: - 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	- Cray XE6	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org uni-stuttgart.de
CPU	AMD Opteron 6276 (Interlagos) CPUs x86-64 · 16C · 2.3 GHz · 32 nm · 115 W Opteron 6276 16C 2.30 GHz	AMD AMDNASDAQ	-	Reported	top500.org uni-stuttgart.de
Interconnect	Cray Gemini Interconnect 3D torus · About 6 GB/s per direction per link · Around 1 microsecond Cray Gemini interconnect	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org
Operating system	Cray Linux Environment Operating systems Linux, Cray-customised · Proprietary layer over open-source Linux Cray Linux Environment	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org

The read

HLRS's Cray XE6 with AMD Interlagos processors, described by the University of Stuttgart as the first and largest such system in Europe and the fastest civil supercomputer in Europe at the time. TOP500 lists 113,472 Opteron 6276 16-core 2.3 GHz cores on the Gemini interconnect, twelfth on the November 2011 list and last present in June 2015. HLRS's wiki says the XE6 is out of production and that the Cray XC40 Hornet is in production; no shutdown date is recorded. TOP500 is the only source for Rmax, Rpeak and cores, so the tier is reported.

Timeline

2011 First operational source
2011-11 List debut at #12 (November 2011) source

Public list appearances

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

#12: TOP500, November 2011 →

Site & facility

HLRS, University of Stuttgart

Location: Stuttgart, Germany
Cooling: Direct liquid cooling
Commissioned: 1996

hlrs.de

Change history

2026-10-02 Added Hermit, the HLRS Cray XE6, twelfth on the November 2011 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
top500.org	names system and part	AMD Opteron 6276 (Interlagos), Cray Gemini, Cray Linux Environment
uni-stuttgart.de	blocked our fetch	-

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