Supercomputers/Systems/Chundoong
South Korea · operational · hpc
Chundoong
Also known as Chundoong SNU
Operated by Seoul National University .
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
- 106.80 TFlop/s
- Rpeak
- 226.46 TFlop/s
- Rmax ÷ Rpeak
- 47.2%
- Cores
- 8,064
- Power
- 72.8 kW
- Per watt
- 1.5 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 Chundoong, and those in South Korea. 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 | 106.80 TFlop/s | #165 of 193 · bottom 16% | #26 of 32 · bottom 20% |
| Energy efficiency | 1.5 GF/W | #48 of 149 · top 32% | #6 of 11 · top 50% |
| Rmax ÷ Rpeak | 47.2 % | #187 of 192 · bottom 4% | #32 of 32 · bottom 1% |
| Power draw | 73 kW | #147 of 151 · bottom 4% | #11 of 11 · bottom 1% |
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 |
|---|---|---|---|---|---|
| Accelerator | - AMD Radeon HD 7970, four per node, 56 nodes | AMD | 224 reported | Reported | thunder.snu.ac.krtop500.org |
| CPU | - Intel Xeon E5-2650 8C 2.0GHz, two per node, 56 nodes | Intel | 112 reported | Reported | thunder.snu.ac.krtop500.org |
| Interconnect | Mellanox InfiniBand QDR Interconnect Fat tree · 40 Gb/s per 4x port Infiniband QDR | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Reported | top500.org |
The read
Chundoong (Korean for thunder) is a self-made heterogeneous supercomputer built in October 2012 by Seoul National University's Center for Manycore Programming with ManyCoreSoft, tied to the group's SnuCL OpenCL framework. A group member's page describes 56 nodes of two 8-core Xeon E5-2650 CPUs and four AMD Radeon HD 7970 GPUs each, a self-made water cooling system for CPUs and GPUs, 106.8 TFlop/s on Linpack (1.907 TFlop/s per node), 277th on the November 2012 TOP500 and 32nd on the November 2012 Green500. TOP500 gives 8,064 cores, InfiniBand QDR, 226.46 TFlop/s Rpeak and 72.8 kW, with a second list entry at 424th in June 2013.
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
- 2026-10-18 Chundoong added from its source pages
Nearby in scale
The machines closest to Chundoong by Rmax, smaller to larger.
- Rostand · France, operational · 0.11 PFlop/s
- Hera (LLNL) · USA, operational · 0.1 PFlop/s
- Olympus (PNNL) · USA, operational · 0.1 PFlop/s
- Beacon (NICS) · USA, operational · 0.11 PFlop/s
- JSS FX1 · Japan, decommissioned · 0.11 PFlop/s
- SuperMike-II · USA, operational · 0.11 PFlop/s
Related systems
Same operator
- SNU Pegasus · South Korea, operational, 2002