What’s Changing?
Name
The name of the machine will change from Jaguar to Titan after the completion of the final phase of the upgrade which is tentatively scheduled for late 2012.
Architecture
The machine will be upgraded from the Cray XT5 architecture to the Cray XK6 architecture beginning in October 2011. The Cray XK6 supercomputer takes the proven Cray XT5 infrastructure and incorporates two innovative new technologies: AMD’s powerful multi-core processors and the Gemini interconnect. For more information on the new architecture, please visit Cray’s website at http://www.cray.com/Products/XK6/XK6.aspx.
Processor
As part of the architecture upgrade, the processor will change from dual 6-core AMD CPUs to a single 16-core AMD CPU.
Cabinets
The number of cabinets will not change after the upgrade is complete. Some cabinets will not be available during fall 2011 to users while the hardware is being upgraded.
Nodes
The number of nodes will remain 18,688.
Cores Per Node
The number of cores on each node will increase from 12 to 16.
Total Cores
The upgrade will increase the number of CPU cores by 33 percent, from 224,256 to 299,008.
Memory/Node
The memory per node will double from 16GB to 32GB.
Memory/Core
The memory per core will increase from 1.3GB to 2GB.
GPUs
As part of the upgrade from the XT5 architecture to the XK6 architecture, 960 NVIDIA Tesla 20-series GPUs will be installed. During the last phase of the project, additional GPUs will be installed. The number of GPUs installed in the final phase will depend upon the budget but the final system should be in the range of 10—20 PF.