USA · decommissioned · classified

Zin

Also known as LLNL Zin Appro Xtreme-X

Operated by Lawrence Livermore National Laboratory at Livermore Computing Center .

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: 773.70 TFlop/s
Rpeak: 961.13 TFlop/s
Rmax ÷ Rpeak: 80.5%
Cores: 46,208
Power: 924 kW
Per watt: 0.8 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	- Xtreme-X GreenBlade GB512X (Appro)	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Reported	top500.org hpc.llnl.gov
CPU	Intel Xeon E5-2670 CPUs x86-64 · 8C · 2.6 GHz · 32 nm · 115 W Xeon E5 (Sandy Bridge-EP) 8C 2.60GHz	Intel INTCNASDAQ	-	Reported	top500.org
Interconnect	Mellanox InfiniBand QDR Interconnect Fat tree · 40 Gb/s per 4x port Infiniband QDR	NVIDIA NVDANASDAQ	-	Reported	top500.org hpc.llnl.gov
Operating system	Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription RHEL 6.2	Red Hat IBMNYSE rolls up to IBM	-	Reported	top500.org

The read

Livermore Computing's Appro Xtreme-X GreenBlade cluster for the NNSA Advanced Simulation and Computing program, 15th on the November 2011 TOP500. TOP500 lists 46,208 Xeon E5-2670 8-core 2.6 GHz cores on InfiniBand QDR at 773.7 TFlop/s Rmax and 961.13 TFlop/s Rpeak, with TOP500 recording a 2011 installation year. LLNL's own page, now marked decommissioned, independently confirms the Appro build, the InfiniBand QDR interconnect and 2,916 nodes with 46,656 cores (it counts login and debug nodes and says commissioned 2012), and lists Zin in its SCF (secure) zone. No decommissioning date is published there, so none is recorded. TOP500 names the manufacturer as Cray/HPE while LLNL names Appro. TOP500 is the only source for Rmax and Rpeak, so the tier is reported.

Timeline

2011 First operational source
2011-11 List debut at #15 (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.

#15: TOP500, November 2011 →

Site & facility

Livermore Computing Center

Location: Livermore, CA, USA
Cooling: Direct liquid cooling (warm water)
Commissioned: 1996

hpc.llnl.gov llnl.gov

Change history

2026-10-02 Added Zin, the LLNL Appro Xtreme-X cluster, 15th 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.

Every source cited on this page was readable, and none of them mentions this system. They are cited at page granularity, normally because no stable deep link could be found. That is a real weakness in this row and it is why the system carries a confidence tier below verified. See how this check works.

Cited source	Result	Found on the page
hpc.llnl.gov	does not name this system	Intel Xeon E5-2670
top500.org	does not name this system	Intel Xeon E5-2670, Mellanox InfiniBand QDR

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

Zin