
The TOP500-ranked K computer system has 864 computer racks equipped with a total of 88,128 CPUs. The system achieved the world's best LINPACK performance of 10.51 petaflops (quadrillion floating-point operations per second) with a computer efficiency ratio of 93.2%. The TOP500 was previously announced in June 2011.
The certification ceremony was held at SC11, the International Conference for High Performance Computing, Networking, Storage and Analysis, held in Seattle, Washington in the US.