Supercomputers/Systems/Aaditya
India · operational · hpc
Aaditya
Also known as IITM iDataPlex; Aaditya HPC
Operated by IITM at IITM (Pashan, Pune) .
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
- 719.22 TFlop/s
- Rpeak
- 790.73 TFlop/s
- Rmax ÷ Rpeak
- 91.0%
- Cores
- 38,016
- Power
- 789.66 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 iDataPlex DX360M4 (TOP500 manufacturer IBM; IIT Guwahati page says Lenovo) | IBM | - | Reported | top500.org |
| CPU | Intel Xeon E5-2670 CPUs x86-64 · 8C · 2.6 GHz · 32 nm · 115 W Xeon E5-2670 8C 2.6GHz | Intel | - | Reported | top500.org |
| Interconnect | Mellanox InfiniBand FDR Interconnect Fat tree · 56 Gb/s per 4x port · About 1 microsecond Infiniband FDR | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Reported | top500.org |
The read
The 2013 IBM iDataPlex DX360M4 cluster of the Indian Institute of Tropical Meteorology in Pune, which preceded Pratyush. TOP500 lists Xeon E5-2670 8C 2.6GHz processors on InfiniBand FDR with 38,016 cores, Rmax 719.22 TFlop/s, Rpeak 790.73 TFlop/s and 789.66 kW; it entered at rank 37 in June 2013 and last appeared at rank 496 in June 2018 (the status date used here). IIT Guwahati's HPC page gives the same 790.7 TFlop/s peak but labels the nodes Lenovo iDataPlex rather than IBM, so the vendor edge follows TOP500.
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
- 2026-10-02 Added Aaditya, the IITM iDataPlex cluster, 37th on the June 2013 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 | does not name this system | Intel Xeon E5-2670, Mellanox InfiniBand FDR |
| iitg.ac.in | names system only | - |
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.