SUNNYVALE, CALIF. -- April 25, 2005 --AMD (NYSE: AMD) today announced all existing and upcoming single- and dual-core AMD Athlon™ 64, AMD Opteron™ and AMD Turion™ 64 processors are designed to be fully compatible with and deliver world-class performance on Microsoft® Windows® Server 2003 x64 Editions and Windows XP Professional x64 Edition.