What are the performance indicators of CPU? What is its concept?

#The performance indicators of CPU include main frequency, FSB, multiplication factor and process technology.

1. Main frequency

is the clock frequency of the CPU. Simply put, it is the working frequency of the CPU. (Recommended learning: web front-end video tutorial)

Generally speaking, the number of instructions completed in one clock cycle is fixed, so the higher the main frequency, the faster the CPU . However, since the internal structures of various CPUs are also different, the performance of the CPU cannot be completely summarized by the main frequency.

The main frequency is related to the actual computing speed. It can only be said that the main frequency is only one aspect of CPU performance and does not represent the overall performance of the CPU.

2. FSB

The FSB is the base frequency of the CPU, the unit is MHz. The CPU's FSB determines the running speed of the entire motherboard. In layman's terms, in desktop computers, the so-called overclocking refers to overclocking the CPU's FSB (of course, under normal circumstances, the CPU multiplier is locked). I believe this is well understood.

But for server CPUs, overclocking is absolutely not allowed. As mentioned earlier, the CPU determines the running speed of the motherboard, and the two run synchronously. If the server CPU is overclocked and the FSB is changed, asynchronous operation will occur, which will cause instability in the entire server system.

3. Multiplier coefficient

The multiplier coefficient refers to the relative proportional relationship between the CPU main frequency and the FSB. Under the same FSB, the higher the frequency multiplier, the higher the CPU frequency. But in fact, under the premise of the same FSB, a high-multiplier CPU itself is of little significance.

This is because the data transmission speed between the CPU and the system is limited. Blindly pursuing high multipliers and obtaining high frequency CPUs will have an obvious "bottleneck" effect - the CPU obtains data from the system. The ultimate speed cannot meet the speed of CPU operation.

4. Process technology

The smaller the process, the smaller the heat generation, so more transistors can be integrated and the CPU efficiency will be higher

The above is the detailed content of What are the performance indicators of CPU? What is its concept?. For more information, please follow other related articles on the PHP Chinese website!