Supercomputers/Systems/TSUBAME1.0
Japan · decommissioned · hpc
TSUBAME1.0
Also known as TSUBAME Grid Cluster; Tokyo Tech TSUBAME 1.0
Operated by Institute of Science Tokyo at Institute of Science Tokyo, Ookayama .
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
- 38.18 TFlop/s
- Rpeak
- 49.87 TFlop/s
- Rmax ÷ Rpeak
- 76.6%
- Cores
- 10,368
- Power
- 1.20 MW
- Per watt
- 0.0 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 | - Sun Fire X4600 (Galaxy 4) eight-socket nodes, 655 nodes of 16 Opteron cores | Sun Microsystems | 655 reported | Reported | top500.orgmicrosoft.com |
| CPU | - Dual-core Opteron 2.4 GHz, 10,480 cores in the operator's count | AMD | - | Reported | top500.orgmicrosoft.com |
The read
The first TSUBAME at Tokyo Institute of Technology (now Institute of Science Tokyo), a Sun Fire X4600 cluster of 655 eight-socket dual-core Opteron nodes on Voltaire InfiniBand, with 360 ClearSpeed CSX600 accelerator boards added. Professor Matsuoka's slides give April 2006 at Tokyo Tech, 10,480 cores, 50.4 TFLOPS from the CPUs, about 1.2 MW peak, SuSE Linux, 1.0 PB of Sun Thumper storage and 7th place on the 27th TOP500 at 38.18 TFLOPS. TOP500 ranks it 7th in June 2006 at 38.18 TFLOPS Rmax and 49.87 peak on 10,368 cores, the figures used here without accelerators. A later upgrade, TSUBAME 1.2, raised the Linpack result. The slides are the operator's own, hosted by Microsoft Research, and no retirement date was found, so the tier is reported.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Institute of Science Tokyo, Ookayama
- Location
- Tokyo, Japan
- Cooling
- Direct liquid cooling
- Commissioned
- 2006
Change history
- 2026-10-02 Added TSUBAME1.0, Tokyo Tech's 2006 Sun Opteron 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.
Every source cited on this page was readable, and none of them mentions this system. They are cited at page granularity, normally because no stable deep link could be found. That is a real weakness in this row and it is why the system carries a confidence tier below verified. See how this check works.
| Cited source | Result | Found on the page |
|---|---|---|
| top500.org | does not name this system | - |
| microsoft.com | does not name this system | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.