USA · operational · hpc

TX-Green

Also known as LLSC TX-Green

Operated by MIT Lincoln Laboratory at MIT LLSC Holyoke .

Researched with AI assistance, checked by scripts. These rows were researched by AI agents reading public operator, laboratory and vendor sources, appended by scripts and checked by automated validation; no subject-matter expert has reviewed them (how this site is made). A mechanical second-reader pass has since fetched every cited source: 1350 of 1540 systems have a readable citation that names them, and 64 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: 1.03 PFlop/s
Rpeak: 1.73 PFlop/s
Rmax ÷ Rpeak: 59.9%
Cores: 41,472
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	- Dell EMC cluster built on S7200AP nodes (TOP500 entry S7200AP Cluster)	Dell Technologies DELLNYSE	-	Reported	top500.org news.mit.edu
CPU	- Intel Xeon Phi 7210 64C 1.3GHz (Knights Landing)	Intel INTCNASDAQ	-	Reported	top500.org
Interconnect	Omni-Path Architecture Interconnect Fat tree · 100 Gb/s per port · About 1 microsecond Intel Omni-Path	Intel INTCNASDAQ	-	Reported	top500.org
Operating system	CentOS Operating systems Linux distribution, RHEL-compatible rebuild · Open source, community-maintained CentOS	The CentOS Project IBMNYSE rolls up to IBM	-	Reported	top500.org

The read

The MIT Lincoln Laboratory Supercomputing Center's Dell EMC petaflop-scale system, installed in November 2016 at Holyoke, Massachusetts. MIT says it has 41,472 cores, six times the processing power and twenty times the bandwidth of its predecessor, and ranked 106th in the world, 43rd in the US and first in New England on the 2016 list (TOP500 as now published shows rank 107); it is described as the only zero-carbon supercomputer on the list, drawing on hydroelectric, wind, solar and nuclear power. TOP500 specifies Intel Xeon Phi 7210 64C 1.3 GHz nodes on Omni-Path with 1.033 PFlop/s Rmax and 1.725 PFlop/s Rpeak under CentOS; no power figure is listed. The laboratory says it is aimed at machine learning, advanced physical devices and autonomous systems, alongside work on space observation, cybersecurity, sensor processing and air traffic control. The GPU machine that followed at the same site is tx-gaia. Listed from November 2016 (rank 107) to June 2019 (rank 490). Tier is reported.

Timeline

2016-11 List debut at #107 (November 2016) source
2016-11 First operational source

Public list appearances

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

#107: TOP500, November 2016 →

Site & facility

MIT LLSC Holyoke

Location: Holyoke, MA, USA

news.mit.edu developer.nvidia.com

Change history

2026-10-17 TX-Green added from its source pages

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
news.mit.edu	names system only	-
top500.org	names system and part	Omni-Path Architecture, CentOS

Checked 2026-10-18 by pnpm verify. Re-run it and the table changes with the web.