The Man Responsible for the iPhone and iPad CPU Just Left Apple for AMDAdrian Covert8/01/12 9:38am121EditPromoteGo to permalinkApple's homegrown processors in their iOS devices are pretty awesome, able to outperform—and in some cases, blow away—other mobile chipsets. Jim Keller, one of the men largely responsible for that feat, is leaving. Where is he going? AMD. Ouch.