Supercomputers/Systems/Virgo (IIT Madras)
India · operational · hpc
Virgo (IIT Madras)
Also known as Virgo; IITM Virgo cluster
Operated by IIT Madras at IIT Madras Computer Centre .
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
- 91.13 TFlop/s
- Rpeak
- 97.84 TFlop/s
- Rmax ÷ Rpeak
- 93.1%
- Cores
- 4,704
- Power
- 97.71 kW
- Per watt
- 0.9 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 | - IBM System x iDataPlex dx360 M4 servers supplied by IBM | IBM | - | Reported | cc.iitm.ac.intop500.org |
| CPU | Intel Xeon E5-2670 CPUs x86-64 · 8C · 2.6 GHz · 32 nm · 115 W Intel Xeon E5-2670 8C 2.6GHz, 292 compute nodes with 2 processors each | Intel | 584 reported | Reported | cc.iitm.ac.intop500.org |
| Interconnect | Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond FDR10 InfiniBand mezzanine adapters | NVIDIA | - | Reported | cc.iitm.ac.intop500.org |
| Storage | - IBM DS3500 storage systems, 160 TB parallel file system and 50 TB NFS | IBM | - | Reported | cc.iitm.ac.in |
The read
IBM System x iDataPlex dx360 M4 cluster of the High Performance Computing Environment at IIT Madras: 292 compute nodes and 2 master nodes with dual Xeon E5-2670 and 64 GB each, FDR10 InfiniBand, and IBM DS3500 storage (160 TB parallel file system). It ranked 224th on the June 2012 TOP500 and 364th in November 2012.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-10-07 Added Virgo (IIT Madras)
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 |
|---|---|---|
| cc.iitm.ac.in | names system and part | Mellanox InfiniBand FDR |
| top500.org | names system and part | Intel Xeon E5-2670, Mellanox InfiniBand FDR |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.