Supercomputers/Systems/GOSAT-2 RCF2
Japan · operational · hpc
GOSAT-2 RCF2
Also known as Research Computation Facility for GOSAT-2
Operated by NIES .
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
- 770.40 TFlop/s
- Rpeak
- 1.24 PFlop/s
- Rmax ÷ Rpeak
- 62.1%
- Cores
- 16,320
- Power
- 78.64 kW
- Per watt
- 9.8 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 | - SGI Rackable C1104-GP1 supplied by NSSOL/HPE | Hewlett Packard Enterprise | - | Reported | top500.orggosat-2.nies.go.jp |
| Accelerator | NVIDIA Tesla P100 Accelerators CUDA (Pascal GP100) · 3,584C · 1.48 GHz · 16 nm · 300 W NVIDIA Pascal GPUs (Tesla P100), 900 TFlop/s theoretical peak | NVIDIA | - | Reported | gosat-2.nies.go.jptop500.org |
| CPU | Intel Xeon E5-2650 v4 CPUs x86-64 · 12C · 2.2 GHz · 14 nm Intel Xeon E5-2650 v4 12C 2.2GHz, 120 compute nodes with 2,880 CPU cores | Intel | 240 estimated | Reported | gosat-2.nies.go.jptop500.org |
| Interconnect | Mellanox InfiniBand EDR Interconnect Fat tree · 100 Gb/s per 4x port · About 0.9 microseconds InfiniBand EDR, 100 Gbps | Mellanox NVDANASDAQ
rolls up to NVIDIA | - | Reported | gosat-2.nies.go.jptop500.org |
The read
Research Computation Facility for GOSAT-2, installed by NIES in March 2016 to develop the GOSAT-2 greenhouse-gas retrieval algorithms: 120 compute nodes with Xeon E5-2650 v4 (2,880 CPU cores) and NVIDIA Pascal GPUs on Infiniband EDR with DDN SFA14K storage. NIES itself cites 9,796 MFlops/W and eighth place on the June 2017 Green500; the TOP500 entry (SGI Rackable C1104-GP1, NSSOL/HPE, 16,320 total cores, 770.4 TFlop/s Rmax on 78.64 kW, rank 221) gives the same efficiency of about 9.80 GFlops/Watt. NIES quotes a 1 PFlop/s theoretical peak against TOP500's 1.24 PFlop/s; the list value is used here. Last TOP500 appearance was June 2018.
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
- 2026-10-07 Added GOSAT-2 RCF2
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 | names system and part | Intel Xeon E5-2650 v4, NVIDIA Tesla P100, Mellanox InfiniBand EDR |
| gosat-2.nies.go.jp | names system and part | Intel Xeon E5-2650 v4, Mellanox InfiniBand EDR |
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.