Supercomputers/Systems/JLab 21g
USA · operational · hpc
JLab 21g
Also known as Jefferson Lab 21g GPU cluster
Operated by Jefferson Lab at Jefferson Lab Newport News .
Researched with AI assistance, checked by scripts. These rows were researched by AI agents reading public operator, laboratory and vendor sources, appended by scripts and checked by automated validation; no subject-matter expert has reviewed them (how this site is made). A mechanical second-reader pass has since fetched every cited source: 1350 of 1540 systems have a readable citation that names them, and 64 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
- -
- Rpeak
- -
- Rmax ÷ Rpeak
- -
- Cores
- 256
- 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 |
|---|---|---|---|---|---|
| Accelerator | - 8x AMD MI100 GPU per node with inter-GPU Infinity fabric, 64 GPUs total | AMD | 64 reported | Reported | jlab.org |
| CPU | - Dual AMD EPYC Rome 7502 2.5GHz 32-core, 8 nodes | AMD | 16 reported | Reported | jlab.org |
The read
Small AMD-GPU lattice QCD cluster at Jefferson Lab deployed in 2021: 8 nodes, each with dual AMD EPYC Rome 7502 (32 cores), 1 TB of memory (3200 MT/s per the lab table), a 2 TB SSD and eight AMD Instinct MI100 GPUs joined by an Infinity fabric, giving 64 GPUs and 256 CPU cores on 100 Gb/s InfiniBand. The lab's own page counts 64 GPUs as the cluster total. Companion to jlab-24s. No benchmark figure is published.
Timeline
- 2021 First operational source
Site & facility
Change history
- 2026-10-18 Added JLab 21g (Jefferson Lab)