What are the main performance indicators of microcomputers

The main performance indicators of microcomputers are: 1. Operation speed, which refers to the number of instructions that can be executed per second; 2. Main frequency; 3. Word length, which refers to the number of instructions that the computer's computing components can perform simultaneously at one time. Number of bits of binary data processed; 4. Internal memory capacity; 5. External memory capacity; 6. Access cycle; 7. I/O speed; 8. Cost-effectiveness.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Microcomputers are referred to as "microcomputers" and "microcomputers". Because they have certain functions of the human brain, they are also called "microcomputers". Microcomputer is a small electronic computer composed of large-scale integrated circuits. It is a bare metal based on a microprocessor, equipped with internal memory, input and output (I/0) interface circuits and corresponding auxiliary circuits.

The main performance indicators of microcomputers

1. Operation speed

The commonly referred to computer operation speed (average operation speed Speed) refers to the number of instructions that can be executed per second, generally described by "mips (Million Instruction Per Second)".

2. Main frequency

Microcomputers generally use the main frequency to describe the computing speed. For example, the main frequency of Pentium/133 is 133 MHz, and the main frequency of Pentium 4 1.5G is 1.5GHz. Generally speaking, the higher the main frequency, the faster the computing speed.

3. Word length

The word length refers to the number of bits of binary data that can be processed simultaneously by the computer's computing unit at one time. The longer the word length, the higher the computing accuracy of the computer if it is used to store data; the stronger the computer's processing power if it is used to store instructions. Usually the word length is always an integer multiple of 8, such as 8, 16, 32, 64 bits, etc. Intel 486 machine and Pentium 4 machine are both 32-bit machines

When other indicators are the same, the larger the word length, the faster the computer can process data and the higher the accuracy.

4. Internal memory capacity

Internal memory, also referred to as main memory, is a memory that the CPU can directly access. Programs that need to be executed and data that need to be processed are stored in the main memory. . The size of internal memory reflects the computer's ability to store information instantly. The larger the memory capacity, the more powerful the system is and the larger the amount of data it can handle.

5. Capacity of external memory

External memory capacity usually refers to the hard disk capacity (including built-in hard disk and removable hard disk). The larger the external memory capacity, the more information can be stored and the richer the application software that can be installed.

6. Access cycle

Storing the information code into the memory is called "writing", and taking the information code out of the memory is called "reading". The time required for the memory to perform a "read" or "write" operation is called the access time (or read and write time) of the memory, and two independent "read" or "write" operations are started in succession (such as two consecutive " The shortest time required for a "read" operation) is called the access cycle.

7. I/O speed

The speed of host I/O depends on the design of the I/O bus. This does not matter much for slow devices (such as keyboards and printers), but the effect is very obvious for high-speed devices.

8. Cost-effectiveness

The full name of cost-effectiveness is performance-price ratio, and the formula is: cost-effectiveness=performance/price. The price/performance ratio should be based on your product performance requirements. Performance requirements should be met first, and then whether the price is appropriate.

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