Supercomputers/Systems/Titan
USA · decommissioned · hpc
Titan
Also known as Cray XK7
Operated by Oak Ridge National Laboratory at Oak Ridge Leadership Computing Facility.
Phase 1 seed dataset — under review. These rows were compiled by hand from public operator, laboratory and vendor sources, and have not yet been through a second-reader verification pass. Every claim carries its source and a confidence tier; treat anything below verified as a lead, not a citation.
Measured performance
- Rmax
- 17.59 PFlop/s
- Rpeak
- 27.11 PFlop/s
- Rmax ÷ Rpeak
- 64.9%
- Cores
- 560,640
- Power
- 8.21 MW
- Per watt
- 2.1 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 | — Cray XK7 | Cray HPENYSE rolls up to Hewlett Packard Enterprise | — | Reported | olcf.ornl.gov |
| Accelerator | NVIDIA Tesla K20X Accelerators NVIDIA K20x | NVIDIA | 18,688 reported | Reported | olcf.ornl.gov |
| CPU | AMD Opteron 6274 (Interlagos) CPUs Opteron 6274 16C 2.2GHz | AMD | 18,688 reported | Reported | olcf.ornl.gov |
| Interconnect | Cray Gemini Interconnect Cray Gemini interconnect | Cray HPENYSE rolls up to Hewlett Packard Enterprise | — | Reported | olcf.ornl.gov |
| Operating system | Cray Linux Environment Operating systems Cray Linux Environment | Cray HPENYSE rolls up to Hewlett Packard Enterprise | — | Reported | olcf.ornl.gov |
The read
Jaguar rebuilt with one NVIDIA K20X per node. The first US No. 1 whose performance came predominantly from GPUs, and the origin of the accelerator-share question this site exists to answer properly: by machine count Titan was one system, but by installed FLOPS it moved a large fraction of US leadership compute onto a single accelerator vendor in one procurement.
Timeline
- 2011 Announced source
- 2012-11 List debut at #1 (November 2012) source
- 2012-11 First operational source
- 2019-08 Decommissioned source
Public list appearances
Pointers only — rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Oak Ridge Leadership Computing Facility
- Location
- Oak Ridge, TN, USA
- Utility
- Tennessee Valley Authority
- Cooling
- Direct liquid cooling (warm water)
- Commissioned
- 1993