Microprocessor vs discrete FET clock speed

How do microprocessors achieve such high clock speeds when discrete FETs can only achieve approx 20MHz? Do they have a large number of parallel sequential logic systems?

Th开发者_运维百科anks in advance.

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Single transistors can switch much faster than the clock of a microprocessor. One example: 45 GHz transistors by Infineon.

Usually there are somewhere around 15-25 transistors in series in the longest path of a modern CPU, so the clock speed is at least an order of magnitude less than the switching speed of the individual transistors.