Titan, Cray® XK7™

Titan is a hybrid-architecture Cray® XK7™ system with a theoretical peak performance exceeding 27,000 trillion calculations per second (27 petaflops). It contains both advanced 16-core AMD Opteron™ central processing units (CPUs) and NVIDIA® Kepler graphics processing units (GPUs). This combination allows Titan to achieve 10 times the speed and 5 times the energy efficiency of its predecessor, the Jaguar supercomputer, while using only modestly more energy and occupying the same physical footprint.

Titan features 18,688 compute nodes, a total system memory of 710 terabytes, and Cray’s high-performance Gemini network. Its 299,008 CPU cores can guide simulations while the accompanying GPUs can handle hundreds of calculations simultaneously. The system provides decreased time to solution, increased complexity of models, and greater realism in simulations. Titan is helping launch a new era for science and engineering as computing approaches the exascale, or a million trillion calculations a second.

Specifications and Features

  • Architecture: Cray XK7
  • Processor: 16-Core AMD
  • Cabinets: 200
  • Nodes: 18,688 AMD Opterons
  • Cores/node: 16
  • Total cores: 299,008 Opteron Cores
  • Memory/node: 32GB + 6GB
  • Memory/core: 2GB
  • Interconnect: Gemini
  • GPUs: 18,688 K20X Keplers
  • Speed: 27 PF

System Support

The System User Guide is the definitive source of information about Titan, and details everything from connecting to running complex workflows. Please direct questions about Titan and its usage to the OLCF User Assistance Center by emailing help@olcf.ornl.gov.

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