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This article mainly introduces what the CPU performance index is, which 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.

CPU performance indicators are: 1, frequency; 2, CPU cache capacity and performance; 3, CPU working voltage; 4, CPU bus mode; 5, CPU manufacturing; 6, superscalar.

CPU performance metrics include:

I. Frequency

The frequency of CPU refers to its working frequency, which is divided into main frequency, external frequency and frequency doubling.

1. The main frequency is actually the clock rate when the CPU kernel is working. The main frequency of CPU represents the oscillation speed of digital pulse signal in CPU. Therefore, it can not be directly explained that the speed of the main frequency is the direct reflection of the running speed of the computer CPU, and we can not completely use the main frequency to summarize the performance of CPU.

2. The external frequency is the working frequency of the system bus, that is, the reference frequency of the CPU, and it is the speed of synchronous operation between the CPU and the motherboard. The higher the external frequency speed, the CPU can accept more data from peripheral devices at the same time, thus further improving the speed of the whole system.

3. Frequency doubling refers to the multiple of the difference between the CPU external frequency and the main frequency.

II. Cache capacity and performance of CPU

The larger the cache capacity of the calculation, the better its performance. When carrying out data processing and operation, the computer will first store the read data to one side, and then accumulate to a certain amount and then transmit it at the same time, so that the difference in processing speed between different devices can be solved. This is the cache capacity. When processing data, the temporary storage point of data, according to reason, as long as the larger the cache capacity, the greater the data processing speed of the computer, the faster the computer will run.

3. CPU operating voltage

The range of normal working voltage of CPU is relatively wide. In the early stage of computer development, the approved voltage of CPU is about 5 volts. Later, with the development of CPU technology and technology, the voltage required for the normal operation of CPU is getting lower and lower than before, and the lowest voltage can reach 1.1 V. in such a low voltage environment, CPU can also operate normally. Some enthusiasts achieve the goal of overclocking by strengthening the working voltage and the operation efficiency of CPU, which greatly improves the operation efficiency of CPU, but this is an undesirable way to consume the service life of CPU.

IV. The bus mode of CPU

Generally speaking, we divide the internal bus structure of CUP into three categories: single-wire structure, in which all the internal components are connected by one bus, which is simple in structure and low in performance. Dual-bus structure, there are two buses connecting each component, which is called dual-bus structure. Multi-bus structure, the multi-bus structure is formed when there are three or more buses connecting the components in the CPU.

5. CPU manufacturing

The manufacturing process of CPU was first made by 0.5um. With the improvement of manufacturing level, people mostly used 0.25um later. Nowadays, with the rapid development of science and technology, the manufacturing process of CPU has been measured in nanometers.

VI. Superscalar

Superscalar means that CPU can execute more than one instruction in a clock cycle. This is hard to imagine on 486 or previous CPU, only CPU above Pentium level has this superscalar structure; CPU below 486 belongs to low scalar structure, that is, it takes at least one or more clock cycles to execute an instruction in this kind of CPU.

Thank you for reading this article carefully. I hope the article "what is the CPU performance indicator" shared by the editor will be helpful to you. At the same time, I also hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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