Hardware components of a computer

The computer is composed of hardware and software, hardware is the most basic part of the computer. But how much do you know about computer hardware? Read this article you have a more comprehensive understanding of the hardware components of the computer.

　　The most basic hardware components of a computer:

The so-called hardware, is the hand can touch the kind, a computer generally have:

1, Host: The host from the look is a whole, but open the chassis, it will find that its internal by a variety of independent components combined.

Here is a description of the various parts of the computer host:

(1) Power supply: The power is the computer's indispensable power supply equipment, its role is to convert 220V AC to the computer used in the 5V,12V,3.3V DC, its performance is good or bad, directly affect the stability of other equipment work, which will affect the stability of the machine.

(2) Motherboard: The motherboard is a computer in each part of the work of a platform, it puts the computer parts are tightly connected together, each part through the motherboard for data transmission. In other words, the important "transport hub" in the computer is on the motherboard, the stability of its work affects the stability of the whole machine.

(3) CPU:CPU (Central precessing unit) is the CPU, its function is to perform calculations, logic operations, data processing, rounding, input/output control computer automatically, coordinated to complete various operations. As the core of the whole system, the CPU is the highest execution unit of the whole system, so the CPU has become the core component of the computer performance, many users use it as the standard to judge the grade of the computer.

(4) Memory: Memory is also called internal memory (RAM), electronic storage equipment, which is composed of circuit boards and chips, characterized by small size, fast, electricity can be saved, no electricity to empty, that is, the computer in the power-on state memory can be stored data, shutdown will automatically empty all of the data.

(5) Hard disk: The hard disk belongs to the external memory, made of metal magnetic disc, and the magnetic disc has memory function, so the data stored to the magnetic disc, whether in the boot, or shutdown, will not be lost.

(6) sound card: sound card is the composition of multimedia computer essential hardware equipment, its role is when the playback command, the sound card will be the computer's voice digital signal into analog signals sent to the speaker sound.

(7) Graphics card: Graphics card when working with the display output graphics, text, the role is responsible for the CPU sent to the digital signal into the display identification of analog signals, transmitted to display on the display.

(8) Modem: Modem is one of the essential devices for Internet access via telephone line. Its role is to convert the digital signals processed on the computer into analog signals transmitted by telephone lines.

(9) Network card: The role of the network card is to act as a bridge between the computer and network cable, which is used to establish one of the important equipment of the Bureau network.

(10) Floppy drive: The floppy disk drive is used to read data from floppy disks. Floppy disk is a writable external storage device.

(11) Optical drive: The optical drive is used to read the device in the disc. The CD-ROM is a read-only external storage device with a capacity of around 650MB.

2, Monitor: The display has a big and small, thin and thick, variety, its role is the computer processing results displayed. It is an output device, is one of the necessary parts of the computer.

3, Keyboard: Keyboard is the main input device for the text, numbers and so on to the computer.

4, Mouse: When people move to the mouse, the computer screen will have an arrow pointer to follow the move, and can be very accurate to point to the position of the point, quickly positioned on the screen, it is people use the computer is an indispensable part.

5. Speaker: It can play out the sound of the computer.

6, the printer: Through it can be the computer files printed on paper, it is one of the important output equipment.

7, camera, scanner, digital image machine and other equipment.