Supercomputers/Systems/Improv
USA · operational · hpc
Improv
Also known as Argonne LCRC Improv
Operated by Argonne National Laboratory .
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
- 2.51 PFlop/s
- Rpeak
- 3.38 PFlop/s
- Rmax ÷ Rpeak
- 74.3%
- Cores
- 105,600
- 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 PowerEdge R6525 | Dell Technologies | - | Reported | top500.org |
| CPU | AMD EPYC 7713 (Milan) CPUs x86-64 · 64C · 2 GHz · 7 nm · 225 W AMD EPYC 7713 64C 2GHz, two per node on 825 nodes (arithmetic from node count) | AMD | 1,650 estimated | Verified | top500.orgargonne-lcrc.github.io |
| Interconnect | NVIDIA InfiniBand HDR Interconnect Fat tree or dragonfly+ · 200 Gb/s per port · About 0.6 microseconds NVIDIA/Mellanox HDR200 InfiniBand, 14 core and 35 edge switches | NVIDIA | - | Reported | argonne-lcrc.github.io |
| Operating system | Red Hat Enterprise Linux Operating systems Linux distribution · Open source, commercial support subscription RHEL | Red Hat | - | Reported | top500.org |
The read
Argonne's Laboratory Computing Resource Center (LCRC) general-purpose cluster. TOP500 lists a Dell PowerEdge R6525 system with AMD EPYC 7713 64-core 2 GHz processors, InfiniBand and RHEL, 105,600 cores, Rmax 2.51 PFlop/s and Rpeak 3.38 PFlop/s, installed in 2023. The LCRC user guide independently states 825 dual-socket nodes with EPYC 7713 processors (128 cores per node, 105,600 cores in total), 256 GB of DDR4 per node (12 large-memory nodes with 1 TB), about 219.6 TB of memory and an NVIDIA/Mellanox HDR200 interconnect. TOP500 shows it ranked 360th in November 2023, 396th in June 2024, 442nd in November 2024 and 486th in June 2025. The physical hall within Argonne is not stated in the fetched pages, so no site is recorded.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Change history
- 2026-10-02 Added Improv, Argonne LCRC's EPYC 7713 cluster
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 |
|---|---|---|
| argonne-lcrc.github.io | names system only | · counts: 1650 |
| top500.org | names system and part | AMD EPYC 7713 (Milan), NVIDIA InfiniBand HDR |
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.