Germany · decommissioned · hpc

CoolMUC-3

Also known as LRZ CoolMUC-3; CooLMUC 3 Knights Landing cluster

Operated by LRZ at Leibniz Supercomputing Centre, Garching .

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: 1263 of 1345 systems have a readable citation that names them, and 56 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: -
Rpeak: 459.00 TFlop/s
Rmax ÷ Rpeak: -
Cores: 9,472
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	- MEGWARE supplied the system with SlideSX-LC chassis	MEGWARE	-	Reported	megware.com doku.lrz.de
CPU	- Intel Xeon Phi 7210-F Knights Landing, 64 cores, 148 nodes	Intel INTCNASDAQ	148 reported	Reported	doku.lrz.de megware.com
Interconnect	Omni-Path Architecture Interconnect Fat tree · 100 Gb/s per port · About 1 microsecond Intel Omni-Path dual 100 Gbit/s fat tree	Cornelis Networks	-	Reported	doku.lrz.de megware.com
Cooling	Direct liquid cooling, warm water Cooling Direct-to-chip cold plates, facility water loop · Removes 90+ percent of node heat to liquid Direct hot-water cooling of nodes, power supplies and Omni-Path switches	MEGWARE	-	Reported	megware.com doku.lrz.de

The read

LRZ's hot-water-cooled many-core Linux cluster, supplied by MEGWARE under a contract announced on 30 January 2017 (about 1 million euros, funded by the DFG and the Free State of Bavaria). It has 148 nodes, each with an Intel Xeon Phi 7210-F (Knights Landing, 64 cores, 16 GB MCDRAM) and 96 GB of DDR4, joined by dual 100 Gbit/s Omni-Path in a fat tree with a 1:2 blocking factor; compute and login nodes, power supplies and Omni-Path switches are cooled directly with hot water. LRZ documentation lists 459 TFlop/s peak and a 255 TFlop/s Linpack commitment. The core total is 148 nodes times 64 cores. LRZ now files the page under decommissioned systems without giving a date.

Timeline

2017 First operational source

Site & facility

Leibniz Supercomputing Centre, Garching

Location: Garching, Germany
Cooling: Direct warm-water cooling
Commissioned: 2006

doku.lrz.de

Change history

2026-10-09 Added CoolMUC-3

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
doku.lrz.de	blocked our fetch	-
megware.com	names system and part	Omni-Path Architecture, Direct liquid cooling, warm water

Checked 2026-10-13 by pnpm verify. Re-run it and the table changes with the web.