ILGTI Cray XC30

Also known as TIFR Cray XC30; Indian Lattice Gauge Theory Initiative Cray XC30

Operated by TIFR at TIFR Hyderabad Campus .

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: 558.80 TFlop/s
Rpeak: 730.66 TFlop/s
Rmax ÷ Rpeak: 76.5%
Cores: 11,424
Power: 319.87 kW
Per watt: 1.7 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 XC30	Cray HPENYSE rolls up to Hewlett Packard Enterprise	-	Verified	top500.org iitg.ac.in
Accelerator	NVIDIA Tesla K20X Accelerators CUDA (Kepler GK110) · 2,688C · 0.732 GHz · 28 nm · 235 W NVIDIA K20x	NVIDIA NVDANASDAQ	-	Reported	top500.org
CPU	- Intel Xeon E5-2680v2 10C 2.8GHz	Intel INTCNASDAQ	-	Reported	top500.org
Interconnect	Cray Aries Interconnect Dragonfly · About 10 GB/s per direction · Around 1 microsecond Aries 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

Cray XC30 installed in 2015 for the Indian Lattice Gauge Theory Initiative at the Tata Institute of Fundamental Research, the first XC30 delivered to India. TOP500 lists Xeon E5-2680v2 10C 2.8GHz with NVIDIA K20x accelerators on Aries, 11,424 cores, Rmax 558.8 TFlop/s, Rpeak 730.66 TFlop/s and 319.87 kW; it entered at rank 114 in June 2015 and last appeared at rank 488 in November 2017 (the status date used here). IIT Guwahati's HPC page independently lists 730.7 TFlop/s peak and 476 Ivy Bridge nodes.

Timeline

2015 First operational source
2015-06 List debut at #114 (June 2015) source

Public list appearances

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

#114: TOP500, June 2015 →

Site & facility

TIFR Hyderabad Campus

Location: Hyderabad, India
Commissioned: 2015

iitg.ac.in top500.org

Change history

2026-10-02 Added the TIFR ILGTI Cray XC30, 114th on the June 2015 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	Cray Aries, Cray Linux Environment
iitg.ac.in	does not name this system	NVIDIA Tesla K20X

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