> Single-thread performance it tied to clock frequency Within an architecture, yes, but between architectures performance of different usage patterns may vary

> Single-thread performance it tied to clock frequency Within an architecture, yes, but between architectures performance of different usage patterns may vary wildly. > which cannot go above 5Ghz this is objectively false. Intel is shipping (limited amounts of) chips that boost over 5GHz, and IBM is shipping its z15 z/architecture CPU which clocks at 5.2 GHz, and shipped its ancestor, the zEC12 CPU clocking in at 5.5Ghz (!), in 2012.