Sweden · decommissioned · hpc

Lindgren

Also known as PDC Cray XE6 Lindgren

Operated by PDC Center for HPC at PDC Data Centre, KTH .

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: 237.20 TFlop/s
Rpeak: 305.63 TFlop/s
Rmax ÷ Rpeak: 77.6%
Cores: 36,384
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 pdc.kth.se
CPU	- Opteron 6172 12C 2.1 GHz	AMD AMDNASDAQ	-	Reported	top500.org
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 pdc.kth.se

The read

KTH's first Cray, financed by the Swedish National Infrastructure for Computing and KTH. PDC signed in June 2010 for a Cray XT6m that was to be upgraded to a Cray XE6 with Gemini interconnect and over 305 TFlop/s peak. TOP500 lists the XE6 with 36,384 Opteron 6172 12-core 2.1 GHz cores, 31st on the June 2011 list with 237.2 TFlop/s Rmax, and keeps it listed until November 2014.

Timeline

2010 First operational source
2010-06-22 Announced source
2011-06 List debut at #31 (June 2011) source

Public list appearances

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

#31: TOP500, June 2011 →

Site & facility

PDC Data Centre, KTH

Location: Stockholm, Sweden
Commissioned: 2021

pdc.kth.se top500.org

Change history

2026-10-02 Added Lindgren, KTH PDC's Cray XE6

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
pdc.kth.se	does not name this system	Cray Gemini
top500.org	names system and part	Cray Gemini

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