The main frequency is a performance indicator that reflects the "computing speed" of the computer. 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 a performance indicator that reflects the "computing 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 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 operation. The level of the clock frequency reflects to a large extent The speed of the CPU.
There is a certain relationship between the main frequency and the actual computing speed, but it is not a simple linear relationship. The main frequency indicates the speed at which the digital pulse signal oscillates in the CPU. The computing speed of the CPU also depends on various performance indicators such as the CPU's pipeline and bus. In other words, the main frequency is only one aspect of CPU performance and does not represent the overall performance of the CPU.
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.
Frequency and speed
The relationship between frequency and speed: Generally speaking, the number of instructions completed in one clock cycle is fixed, so the higher the main frequency, the higher the frequency of the CPU. The speed is getting faster. However, since the internal structures of various CPUs are also different, the performance of the CPU cannot be completely summarized by the main frequency. But the frequency of the CPU can determine the grade and price level of the computer. Take Pentium 4 2.0 as an example. Its main operating frequency is 2.0GHz. What does this mean?
Specifically, 2.0GHz means that it will generate 2 billion clock pulse signals every second, and each clock signal period is 0.5 nanoseconds. The Pentium 4 CPU has 4 pipeline computing units. If the load is even, the CPU can perform 4 binary addition operations in 1 clock cycle.
This means that the Pentium 4 CPU can perform 8 billion binary addition operations per second. However, such amazing computing speed cannot fully serve users. The computer hardware and operating system themselves also consume CPU resources. However, the Athlon XP processor adopts the PR nominal method. The conversion calculation formula between the nominal frequency and the actual frequency of the Athlon XP processor with a front-side bus frequency of 266MHz disclosed by AMD is as follows: Nominal frequency = 3 × actual frequency / 2-500 actual frequency =2×nominal frequency/3 333 For example, the actual frequency of Athlon XP 2100 is 1733MHz=2×2100/3 333.
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