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This article mainly introduces what the main frequency in the computer refers to, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, let the editor take you to understand it.

The main frequency is the performance index that reflects the "operation speed" of the computer. The main frequency of CPU does not represent the speed of CPU, but increasing the main frequency is very important to improve the operation speed of CPU. Only when the main frequency is increased, the running speed of each subsystem and the data transmission speed between subsystems can be improved.

The operating environment of this tutorial: windows7 system, Dell G3 computer.

The main frequency is the performance index that reflects the "operation speed" of the computer. Microcomputers generally use the main frequency to describe the operation speed, the higher the main frequency, the faster the operation speed.

The main frequency is the clock frequency of CPU. The operation of the computer is carried out step by step under the control of the clock signal, and each clock signal cycle completes one-step operation. The clock frequency reflects the speed of CPU to a large extent.

There is a certain relationship between the main frequency and the actual operation speed, but it is not a simple linear relationship. The main frequency represents the concussion speed of the digital pulse signal in the CPU, and the operation speed of the CPU depends on the performance indicators of the CPU pipeline, bus and so on. In other words, the dominant frequency is only one aspect of the performance of CPU, and does not represent the overall performance of CPU.

The main frequency of CPU does not represent the speed of CPU, but increasing the main frequency is very important to improve the speed of CPU operation. For example, if a CPU executes an operation instruction in a clock cycle, CPU will be twice as fast when running on the 100MHz main frequency as it is running on the 50MHz main frequency. Because the clock cycle of 100MHz is half the clock cycle time of 50MHz, that is, the time required by CPU working at 100MHz main frequency to execute an operation instruction is only half that of 10ns, which is half that of 20ns working at 50MHz main frequency, and the natural operation speed is twice as fast. However, the overall running speed of the computer depends not only on the CPU operation speed, but also on the operation of other subsystems. only when the main frequency is increased, the running speed of each subsystem and the data transmission speed between the subsystems can be improved, can the overall running speed of the computer be really improved.

Frequency and speed

The relationship between frequency and speed: generally speaking, the number of instructions completed in a clock cycle is fixed, so the higher the main frequency, the faster the speed of CPU. However, due to the different internal structures of all kinds of CPU, the performance of CPU can not be completely summarized in terms of main frequency. But the level of CPU main frequency can determine the grade and price level of the computer. Take Pentium 42.0 as an example, its main working frequency is 2.0GHz. What does this mean?

Specifically, 2.0GHz means that it produces 2 billion clock pulses per second, with each clock signal cycle of 0.5 nanoseconds. Pentium 4 CPU has four pipelined operation units. If the load is uniform, CPU can perform four binary addition operations in one clock cycle.

This means that the Pentium 4 CPU can perform 8 billion binary addition operations per second. However, such amazing computing speed can not fully serve the users, and the computer hardware and the operating system itself also consume CPU resources. However, the Athlon XP processor adopts the PR nominal mode. The conversion formula between the Athlon XP processor nominal frequency and the actual frequency of the 266MHz front-end bus frequency disclosed by AMD is as follows: nominal frequency = 3 × actual frequency / 2-500 actual frequency = 2 × nominal frequency / 333 for example, the actual frequency of Athlon XP 2100 + is 1733MHz=2 × 2100amp 333.

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