IBM Roadrunner

Roadrunner is the name of a state-of-the-art supercomputer at the Los Alamos National Laboratory in New Mexico, USA. Currently the world's fastest supercomputer, the $133 million Roadrunner is designed for a performance level of 1.026 petaflops peak, which it reached in June 2008, and to be the world's first TOP500 Linpack sustained 1.0 petaflops system. IBM built the computer for the U.S. Department of Energy (DOE). It is a hybrid design with almost 6,912 AMD Opteron dual core processors and almost 12,960 IBM PowerXCell 8i CPUs in special designed TriBlades connected by Infiniband.

http://en.wikipedia.org/wiki/IBM_Roadrunner