Up to Haswell’s 2013 release, Intel’s “tick-tock” strategy seemed unstoppable. Broadwell sought to continue Intel’s juggernaut by porting Haswell to a new 14 nm node. The new node would lower power consumption, while minor architecture changes targeted a 5% IPC increase. Intel had good reason to believe everything would go according to plan. Tick-tock had gone well for the past few generations, and Broadwell’s minor architecture changes would let engineers focus on any process node issues. Unfor...