The platform is used in Titan, the world's second fastest supercomputer in the November 2013 list as ranked by the TOP500 organization.
The hybrid architecture requires different programming to conventional CPU-only supercomputers; Oak Ridge National Laboratory and the Swiss National Supercomputing Centre hold workshops to educate researchers on the new programming approach.
[3][4] The XK7 platform was announced on October 29, 2012 to coincide with the completion of Titan at Oak Ridge National Laboratory (ORNL).
[9] The National Center for Supercomputing Applications (NCSA) in Illinois has a machine, Blue Waters, using a combination of Cray XE6 and XK7 nodes.
[10] The Swiss National Supercomputing Centre (CSCS) machine named Todi was upgraded to XK7 on October 22, 2012.