SUNNYVALE, CALIF -- June 21, 2004 --AMD (NYSE: AMD) today announced that 30 AMD Opteron™ processor-based systems are listed among the world’s highest-performing supercomputers, as determined by the TOP500 Organization (www.top500.org) Building on an impressive debut on the TOP500 list in November 2003, AMD Opteron processor-based systems appear three times among the top 20 on the most recent list.