【 Weak current college 】 computer components of specific work

We buy Assembly machine, they need to put the computer each necessary components with the qi to form a complete computer. May each of us can say one what hardware to composition. But we know that the computer inside the role of each component, in fact, the Division of spare parts. The following will explain each of the hardware in your computer work are what matter.

First, the video card

Video card aka display adapter card, graphics are 3d graphics accelerator card. It is the connection host interface card and the monitor. Its role is to host the output information is converted into characters, graphics and colors, and other information to appear on the monitor. Display card inserted in the motherboard of ISA, PCI, AGP expansion slot isa display adapter is fundamental. Now there are also some motherboard is integrated.

2. network card

The network adapter is a computer and a network cable connected to the physical interface, integrated in motherboard, some extrapolation from computer expansion slots. Each network card is a face of a specific network, such as Ethernet, token ring, FDDI, and Arcnet.

Third, the out-of-core

Out-of-core usually magnetic media, or disc, like hard drives, floppy disk, tape, CD, etc., to long-term preservation of information, and does not rely on the power to save the information, but driven by mechanical parts, its speed and memory is slow compared to.

Hard disk drive is a magnetic record information for external memory. Storage volume is both sides coated magnetic materials for wafer, spare piece of aluminum alloy end is hard, so called hard disk. Hard disk powered disc has been rotated, so cpu access to the hard drive does not require startup time, access speed, large capacity, high data transfer rate; interview with up the head does not come into direct contact with the disk surface, friction small, increased speed and reduced wear and tear. Hard drive is a precision device, not a strong vibration and crash, power within 30 seconds, don't immediately shut down, when in contact with the hard disk to prevent static damage to the hard drive the human body. Hard drive to store documents for our daily and the program does not occur, as the power loss is now a variety of programs, features and more perfect, we hard drive capacity is constantly increasing.

4. memory

Memory (Ram) also known as random access memory, referring to the storage components on the motherboard, CPU and communicate directly with its stored data parts, storage currently in use of data and programs, its physical essence is one or more groups with data input and output and data storage capabilities of IC, memory is used only for temporary storage of programs and data, once you turn off the power supply or power failure, the program and data is lost. In general all applications to run in RAM, the RAM size can affect the speed of the program. RAM also has a marked characteristic, and that is it stored information, only in power-on State will save, if the machine switched off, then all is not saved on the hard disk or a floppy disk, the information is lost, the next time you start the machine when the memory is not leave behind any previous information.

5. CPU

The Chinese name of the central processing unit CPU. The core of the CPU as a PC, in charge of the whole PC system coordination, control and run the program, along with LSI technology revolution, the processor core has integrated the millions of transistors, is a very sophisticated system. Usually we give effect to the directive on the PC, including external device input analog signal, after convert device turns into a digital signal to control unit for control of allocation, the operation unit operations, including handling and storage cell data storage and Exchange, the last generated data returned to the application, in the end we will see the results in the output device.

6. Board

The motherboard is the most basic microcomputer is also one of the most important part. The Board is composed of computer installed above the main circuit system, generally have a BIOS chip, I/O control chip, keyboard, and the Panel control switch interface, led connectors, expansion slots, motherboard and power supply card DC power connector, and other components. Another characteristic of the motherboard is the adoption of an open architecture. Most are located on 6-8 expansion slots for PC peripheral devices of control card docking. By replacing these cards, you can on the corresponding computer subsystems, partial upgrade manufacturers and users in the configuration models have more flexibility. In short, the motherboard in the entire computer system plays a lift foot fresh summons. It can be said that the Board's decision on the type and grade of the whole computer system types and grades, and motherboard performance impact on the performance of the entire computer system.

7. sound card

Sound card can make our computer sound device, sound card, you can play midi music, because it has the function of music synthesis. Important indicators-sound card-music synthesis, functional separation has two FM synthesis and Wavetable method. Early audio using FM synthesis method, the way it sounds small, poor sound timbre, but cheap. Hardware wavetable synthesis is a new pronunciation method, this method is simple, reliable, and can make no Wavetable soundcard easily obtain the upgrade, but the CPU utilization, requires cpu processed and bus transfers.