Supercomputers/Systems/Oakley
USA · decommissioned · hpc
Oakley
Also known as OSC Oakley
Operated by Ohio Supercomputer Center .
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 1581 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
- 79.32 TFlop/s
- Rpeak
- 88.10 TFlop/s
- Rmax ÷ Rpeak
- 90.0%
- Cores
- 8,280
- Power
- 225 kW
- Per watt
- 0.4 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.
How it compares
Ranked against the other machines in this dataset that report the same figure: those that first came into service within two years of Oakley, and those in USA. Computed from our tables; a metric is ranked only when at least eight peers report it.
| Metric | Value | Against its era | Against its country |
|---|---|---|---|
| Rmax | 79.32 TFlop/s | #178 of 193 · bottom 9% | #256 of 332 · bottom 24% |
| Energy efficiency | 0.4 GF/W | #132 of 149 · bottom 12% | #138 of 162 · bottom 16% |
| Rmax ÷ Rpeak | 90.0 % | #31 of 192 · top 16% | #22 of 331 · top 6% |
| Power draw | 225 kW | #116 of 151 · bottom 24% | #123 of 171 · bottom 29% |
Every metric is ranked largest-first, so a high power-draw rank means a big power draw, not a good one. Rmax ÷ Rpeak uses HPL-measured results only. Rankings move as machines are added; they describe this dataset, not the world.
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 | - HP Cluster Platform SL390s G7 | Hewlett Packard Enterprise | - | Reported | top500.orgosc.edu |
| Accelerator | - 128 NVIDIA Tesla GPUs (Tesla 2070 per TOP500) | NVIDIA | 128 reported | Reported | top500.orgosc.edu |
| CPU | Intel Xeon X5650 CPUs x86-64 · 6C · 2.66 GHz · 32 nm · 95 W Intel Xeon X5650 6C 2.66GHz | Intel | - | Reported | top500.orgosc.edu |
| Interconnect | Mellanox InfiniBand QDR Interconnect Fat tree · 40 Gb/s per 4x port Infiniband QDR | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Reported | top500.orgosc.edu |
The read
Ohio Supercomputer Center's 2012 flagship, an HP-built Xeon cluster that replaced the IBM Opteron 1350 Glenn cluster. OSC's page describes 8,328 cores on 694 nodes (its own technical-specifications section says 670 nodes), 12-core nodes with Xeon X5650 CPUs and 48 GB, 8 nodes with 192 GB, one 1 TB 32-core hugemem node, 128 NVIDIA Tesla GPUs and QDR InfiniBand, about 88 TF peak or just over 154 TF with the GPUs, at about 60 percent of Glenn's power. TOP500 lists 8,280 cores, Rmax 79.32 TF and Rpeak 88.10 TF (the CPU-only peak), 225 kW, at rank 300 in Jun 2012 and 460 in Nov 2012; the GPU model (Tesla 2070) comes from the TOP500 system string. OSC lists Oakley under its decommissioned supercomputers and had planned to retire it by the end of 2018, but no exact retirement date was found so none is recorded. Later OSC systems are separate entries.
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
- 2026-10-17 Oakley added from its source pages
Nearby in scale
The machines closest to Oakley by Rmax, smaller to larger.
- Cernan · USA, operational · 0.08 PFlop/s
- T2K Tsukuba · Japan, decommissioned · 0.08 PFlop/s
- Colosse · Canada, operational · 0.08 PFlop/s
- VIP (Garching) · Germany, operational · 0.08 PFlop/s
- Blues · USA, operational · 0.08 PFlop/s
- New York Blue · USA, decommissioned · 0.08 PFlop/s
Related systems
Same operator
- Owens · USA, decommissioned, 2016
- Ascend (OSC) · USA, operational, 2023
- Cardinal · USA, operational, 2024
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 |
|---|---|---|
| osc.edu | names system and part | Intel Xeon X5650, Mellanox InfiniBand QDR |
| top500.org | names system and part | Intel Xeon X5650, Mellanox InfiniBand QDR |
Checked 2026-10-18 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.