It will start having real problems when Zen 2 will ship using TSMC high-performance 7nm process instead of Zen 1's low-power process from Global Foundries. I.e.

It will start having real problems when Zen 2 will ship using TSMC high-performance 7nm process instead of Zen 1's low-power process from Global Foundries. I.e. Zen 2 will have clock and IPC parity with current and future Intel parts no problem, while costing much less due to increased yields from multi-chip tech.