CPU performance criteria: CPU performance = IPC × frequency

IPC (Instruction per clock):Number of commands executed by the CPU per clock cycle

In fact, the frequency and IPC really affect the CPU performance. Accurate CPU performance judgment criteria should be:CPU performance = IPC (number of commands executed by the CPU per clock cycle) x frequency (MHz clock speed)This formula was initially proposed by Intel and widely recognized by the industry.

If we compare Intel's most advanced series of Intel CPUs with MHz for enterprise-level servers and the Pentium 4 processors with MHz for desktops, we will find that: the anteng processor with a clock speed of only MHz is more powerful than the Pentium 4 processor with a clock speed of MHz.

Reprinted: http://hi.baidu.com/zaoyuan1217/blog/item/8243c134b618c6c9a2cc2b7d.html