AMD Introduces the ATI Radeon HD 4600 Series Graphics Cards for the Masses, Delivering Up To Double the Game Performance of the Competition at the Same Price- HD gaming gets easier with the ATI Radeon HD 4600 series, setting a new standard for mainstream graphics, delivering superior gaming and HD multimedia experiences at low power and exceptional prices – SUNNYVALE, Calif. — September 10, 2008 –AMD (NYSE: AMD) today announced the ATI RadeonTM HD 4600 series, mainstream graphics offerings that deliver exceptional