CPU performance indicators include: 1. Frequency; 2. CPU cache capacity and performance; 3. CPU operating voltage; 4. CPU bus mode; 5. CPU manufacturing; 6. Superscalar.
#The operating environment of this article: Windows 7 system, Dell G3 computer.
CPU performance indicators are:
1. Frequency
The frequency of the CPU refers to its working frequency, which is divided into main frequency, FSB and multiplier.
1. The main frequency is actually the clock frequency of the CPU core when it is working. The main frequency of the CPU represents the oscillation speed of the digital pulse signal in the CPU. Therefore, it cannot be directly explained that the speed of the main frequency is a direct reflection of the running speed of the computer CPU. We cannot completely use the main frequency to summarize the performance of the CPU.
2. The FSB is the operating frequency of the system bus, which is the base frequency of the CPU. It is the speed at which the CPU and the motherboard run synchronously. The higher the FSB speed, the more data the CPU can accept from peripheral devices at the same time, further increasing the speed of the entire system.
3. Frequency multiplication refers to the multiple of the difference between the CPU FSB and the main frequency.
2. CPU cache capacity and performance
The larger the calculated cache capacity, the better its performance. When the computer is performing data processing and calculations, it will first store the read data aside, and then accumulate it to a certain amount and then transfer it simultaneously. This way, the difference in processing speed between different devices can be resolved. This is the cache capacity. When processing data, it is a temporary storage point for data. It stands to reason that as long as the cache capacity is larger, the data processing speed of the computer will be greater, and the computer will run faster.
3. CPU Working Voltage
The normal working voltage range of the CPU is relatively wide. In the early days of computer development, the approved voltage of the CPU at this time was about 5 volts. Later, with the development of CPU technology and technology, the voltage required for the normal operation of the CPU became lower and lower than before, reaching as low as 1.1V. The CPU can also operate normally in such a low-voltage environment. Some enthusiasts achieve the purpose of overclocking by increasing the working voltage and enhancing the operating efficiency of the CPU, which greatly improves the operating efficiency of the CPU. However, this is an undesirable method that consumes the service life of the CPU.
4. CPU bus mode
Generally speaking, we divide the bus structure inside the CUP into three categories: single-line structure, with one bus connecting all internal components, simple structure and low performance. Dual bus structure, there are two buses connecting each component, which is called dual bus structure. Multi-bus structure, if there are 3 or more buses connecting various components in the CPU, it forms a multi-bus structure.
5. CPU Manufacturing
The manufacturing process of CPU was first 0.5um. With the improvement of manufacturing level, most people later used 0.25um. Today, with the rapid development of science and technology, the manufacturing process of CPU has begun to be measured in nanometers.
6. Superscalar
Superscalar means that the CPU can execute more than one instruction in one clock cycle. This is hard to imagine on 486 or previous CPUs. Only Pentium-level CPUs and above have this superscalar structure; CPUs below 486 are low-scalar structures, that is, executing an instruction in this type of CPU requires at least one or more clock cycles above.
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