Back in the day, Intel and AMD were entrenched in a clockspeed race, with both companies pushing increasingly higher clocks with each processor generation. It was never more exciting than the race to 1GHz. As time went on, things stalled out in that regard, and the focuse shifted to core counts. Well, Intel is throwing down the gauntlet later

Source: Hot Hardware – Intel Demos 28-Core, 56-Thread 5GHz Monster Core-X CPU, Available In Q4 2018