What is the main frequency of a computer?

The main frequency refers to the clock frequency of the CPU, expressed in MHz. The main frequency of the CPU does not represent the speed of the CPU, but increasing the main frequency is crucial to increasing the computing speed of the CPU. Only when the main frequency is increased, the operating speed of each subsystem and the data transmission speed between subsystems will decrease. Only when it can be improved can the overall running speed of the computer be truly improved.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The main frequency is the clock frequency of the CPU. The operation of the computer is executed step by step under the control of the clock signal. Each clock signal cycle completes one step of the operation. The level of the clock frequency reflects the speed of the CPU to a large extent. speed.

The main frequency of the CPU does not represent the speed of the CPU, but increasing the main frequency is crucial to increasing the CPU's computing speed. For example, assuming a CPU executes an arithmetic instruction in one clock cycle, when the CPU runs at a main frequency of 100MHz, it will be twice as fast as when it runs at a main frequency of 50MHz. Because the 100MHz clock cycle takes up half the time compared to the 50MHz clock cycle, that is, the time required for a CPU working at a 100MHz main frequency to execute an operation instruction is only 10 ns, which is half shorter than the 20 ns when working at a 50 MHz main frequency. Natural computing The speed is twice as fast. However, the overall running speed of the computer not only depends on the CPU computing speed, but also is related to the operation of other sub-systems. Only by increasing the main frequency, the running speed of each sub-system and the data transmission speed between sub-systems can be improved. After it is improved, the overall running speed of the computer can really be improved.

Increasing the CPU working frequency is mainly limited by the production process. Since the CPU is manufactured on a semiconductor silicon wafer, wires are required to connect the components on the silicon wafer. Under high-frequency conditions, the wires are required to be as thin and short as possible, so as to reduce stray interference such as wire distributed capacitance. To ensure that the CPU operation is correct. Therefore, the limitation of manufacturing process is one of the biggest obstacles to the development of CPU frequency.

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