If so, it should be said that the main frequency of CPU is 2. 13G GHz.

The main frequency of the CPU, that is, the CPU clock speed at which the CPU core works. How many megahertz is a certain CPU? This megahertz is the "CPU main frequency". Many people think that the main frequency of CPU is its running speed, but it is not. The main frequency of CPU indicates the oscillation speed of digital pulse signal in CPU, which is not directly related to the actual computing power of CPU. There is a certain relationship between the main frequency and the actual running speed, but there is no definite formula to quantify the numerical relationship between them, because the running speed of CPU depends on the performance indicators of CPU pipeline (cache, instruction set, CPU bits, etc.). ). Because the main frequency does not directly represent the running speed, in some cases, it is likely that the higher the main frequency, the lower the actual running speed of the CPU. For example, most of AMD's AthlonXP series CPU can achieve the CPU performance of Intel's Pentium 4 series CPU at a low frequency, so AthlonXP series CPU is named after PR value. Therefore, the main frequency is only one aspect of CPU performance and does not represent the overall performance of CPU.