While Anderson’s responsible for bringing Ryzen to market—“you don’t have any idea how many hours I and my team have spent on this,” Anderson said—it’s Papermaster who has to think of the future. When asked how long Zen would last, compared to Intel’s two-year tick-tock cadence, Papermaster confirmed the four-year lifespan and tapped the table in front of him: “We’re not going tick-tock,” he said. “Zen is going to be tock, tock, tock.”
Intel’s tick-tock cadence has typically meant that it develops a new microarchitecture every two years, with Kaby Lake the exception. Though AMD has never taken the time to formalize it, a three- to four-year lifespan for its own CPU architectures is about average. For example, the K8 series architecture debuted with the Opteron and Athlon 64 in 2003; with 2007’s mobile Sempron, the K8 trickled out. The K10 series lasted from about 2007 through 2010.