Jim Keller, now 53 years old, was a chip designer at Advanced Micro Devices (AMD) over a decade ago. His roots in the industry go back much further than that, all the way back to his DEC days where he cut his teeth on Alpha processors, but most recently he served as Director of Platform Architecture at Apple where he had a hand in designing the A4 and A5 processors employed in millions of iPads, iPhones, iPod touch devices, and Apple TV boxes. In a refreshing change of pace for AMD, which has lost some top level talent in recent months and years, Keller is back in Sunnyvale where he'll serve as the company's corporate vice president and chief architect of microprocessor cores.