AMD (NYSE: AMD) today announced that its Quad-Core AMD Opteron™ processors are powering "Jaguar", the first ever wholly x86-based supercomputer to achieve the petaflop performance milestone. AMD Opteron processors now help drive seven of the Top 10 supercomputer systems in the world.
http://feeds.amd.com/~r/amdpressreleases/~3/456274418/