Window Customer Help provides you assistance on product know-hows, gives you a peek into the most frequently asked questions and lets you learn more about Computer, MAC, Phones etc.
Computer Machine composition
The computer is composed of a hardware system and a software system.
The hardware unit of the conventional computer
system can be generally divided into an input unit, an output unit, an arithmetic logic unit, a control unit and
a memory unit, wherein the arithmetic logic unit and the
control unit are collectively referred to as a central processing unit (CPU).
Hardware system
Power Supply
The power supply is an indispensable power
supply device in the computer. Its function is to convert 220V AC power into
5V, 12V, 3.3V DC power used in the computer. Its performance is directly
affected by the stability of other equipment work, and then it will affect the
stability of the whole machine. The laptop provides an effective power
source for the laptop with its own lithium battery.
Motherboard
The motherboard is a platform for the various
components of the computer to work together. It connects the various components
of the computer together and the components are transmitted through the
motherboard.
In other words, the important "transport hub" in
the computer is on the main board, and the stability of its work affects the
stability of the whole machine.
CPU
The CPU is the central processing unit and is the computing core and control
core of a computer. Its function is mainly to explain computer
instructions and to process data in computer software. The CPU consists of
an operator, controller, registers, cache, and a bus that implements the data,
control, and state of the connection between them. As the core of the
whole system, the CPU is also the highest execution unit of the whole system,
so the CPU has become the core component to determine the performance of the
computer. Many users use it as a standard to judge the grade of the computer.
RAM
Memory is also called internal memory or random access memory (RAM), which is divided into DDR memory
and SDRAM memory (but SDRAM has low capacity, slow storage speed and poor
stability, and has been eliminated by DDR). Memory is an electronic storage
device. The circuit board and the chip are characterized by small size, high
speed, electric storage, and no power clearing, that is, the computer can store
data in the memory when the computer is turned on, and all the data therein
will be automatically cleared after the shutdown.
The memory has three
major categories of DDR, DDR II and DDR III, and the capacity is 1-64GB.
Hard Disk
The hard disk belongs to the external memory.
The mechanical hard disk is made of metal magnetic disk, and the magnetic disk
has a memory function, so the data stored on the magnetic disk will not be lost
whether it is turned on or off. The hard disk capacity is very large, it
has reached terabytes, the size is 3.5, 2.5, 1.8, 1.0 inch, etc. The interface
has IDE, SATA, SCSI, etc., SATA is the most common.
A mobile hard disk is
a storage product that emphasizes portability by using a hard disk as a storage
medium. The vast majority of mobile hard drives on the market are based on
standard hard drives, and only a small percentage is based on micro hard drives
(1.8-inch hard drives, etc.), but the price factor determines whether the
mainstream mobile hard drive is still a standard notebook hard drive.
Because
the hard disk is used as the storage medium, the data read and write mode of
the mobile hard disk is the same as that of the standard IDE hard
disk. Mobile hard disks use USB, IEEE1394 and other interfaces with fast
transmission speed, which can transmit data with the system at a higher
speed. A hard disk made of a solid state electronic memory chip array for
a solid state hard disk is composed of a control unit and a memory unit (FLASH
chip). Solid state drives are also identical in size and size to regular
hard drives, but solid state drives are faster than mechanical hard drives.
Sound card
The sound card is an indispensable hardware device
for composing a multimedia computer. Its function is that after the play
command is issued, the sound card converts the sound digital signal in the
computer into an analog signal and sends it to the speaker to make a sound.
Graphics card
The graphics card cooperates with the display
to output graphics and text during operation. The function is to convert and
display the display information required by the computer system, and provide a
line scan signal to the display to control the correct display of the display,
which is an important component for connecting the display and the motherboard
of the personal computer.
It is one of the important equipments for
"human-machine dialogue."
Network card
The network card is a network component
working at the data link layer. It is an interface connecting the computer and
the transmission medium in the local area network. It can not only realize
physical connection and electrical signal matching with the local area network
transmission medium, but also involve frame transmission and reception, and
frame. Encapsulation and unpacking, media access control, data encoding and
decoding, and data caching. The role of the network card is to act as a
bridge between the computer and the network cable. It is one of the important
devices used to establish a local area network and connect to the Internet.
In the integrated motherboard, the sound card,
graphics card, and network card are partially or completely integrated on the
motherboard.
Modem
The English name is "Modem", commonly known as
"cat", that is, modem, type
Available in built-in and external, wired and
wireless. A modem is one of the essential devices when surfing the
Internet via a telephone line. Its function is to convert the digital
signal processed on the computer into an analog signal transmitted by the
telephone line. With the popularity of ADSL broadband networks, built-in
modems have gradually withdrawn from the market.
Optical Drive
The English name is "Optical Disk
driver", a computer used to read and write the contents of optical discs.
It is also a common part in desktop and notebook portable computers. With
the increasing use of multimedia, optical drives have become standard in many
computer accessories. The optical drive can be divided into a CD-ROM
drive, a DVD drive (DVD-ROM), a COMBO, and a DVD burner (DVD-RAM). The
ability and speed of reading and writing is also increasing, 4 × 16 × 32 × 40 ×
48 ×.
Monitor
The English name is "monitor". The
display is large and small, thin and thick, and has various varieties. Its
function is to display the results of computer processing. It is an output
device and is one of the indispensable components of a computer. Divided
into three categories of CRT, LCD, LED, the interface has VGA, DVI two
categories.
Keyboard
The English name is "Keyboard",
which is divided into wired and wireless. The keyboard is the main artificial
input device, usually 104 or 105 keys, used to input text, numbers, etc. to the
computer, and computer control.
Mouse
The English name is "Mouse". When
people move the mouse, there will be an arrow pointer on the computer screen to
move, and it can accurately point to the desired position and quickly locate on
the screen. It is indispensable for people to use the computer. One of the
parts. The keyboard and mouse interface is available in PS/2 and
USB. The hardware mouse is divided into photoelectric and mechanical (the
machine has been eliminated by photoelectric).
Speaker
The English name is "Loud speaker",
which is connected to the power amplifier through the audio cable, and then the
sound is amplified by the transistor and output to the speaker, so that the
speaker emits the sound of the computer. General computer speakers can be
divided into 2, 2.1, 3.1, 4, 4.1, 5.1, 7.1, and the sound quality is also
different.
Printer
The English name is "Printer", which
allows you to print files from your computer to paper. It is one of the
important output devices. In the field of printers, the mainstream
products of needle printers, inkjet printers and laser printers have been
formed, each of which has its advantages and meets the different needs of users
from all walks of life.
Video Equipment
Such as cameras, scanners, digital cameras,
digital video cameras, TV cards and other equipment for processing video
signals.
Flash Drive
The English name is "Flash disk".
The flash drive is also commonly known as USB flash drive, USB flash drive,
flash drive, and is a universal serial bus USB interface. The
micro-high-capacity mobile storage product without physical drive uses a
storage medium for flash memory. Storage media (Flash Memory). Flash
drives generally include a flash memory, a control chip, and a
housing. The flash drive has the advantages of multiple erasing, high
speed, anti-magnetic, shockproof and moisture proof.
Flash disk uses
popular USB interface, the size is only thumb size, weight is about 20 grams,
no driver, no external power supply, plug and play, file exchange between
different computers, storage capacity from 1 to 128GB, to meet different
Demand.
Mobile memory card and card reader
The memory card is a memory that uses flash
memory technology to store electronic information. It is generally used as a
storage medium in small digital products such as digital cameras, PDAs, MP3,
MP4, etc., so it looks like a card, and so it is called for flash
cards.
According to different manufacturers and different applications,
flash cards include Smart Media (SM card), Compact Flash (CF card), Multi Media
Card (MMC card), Secure Digital (SD card), Memory Stick (Memory Stick), TF
Cards and other types, these flash cards have different appearances and
specifications, but the technical principles are the same. Since the flash
card itself cannot be directly recognized by the Computer, the card reader is a
communication bridge between the two. Card Reader) can use a variety of
memory cards, such as Compact Flash or Smart Media or Microdrive memory cards,
as an information access device for memory cards.
The card reader uses the
USB1.1/USB2.0 transmission interface to support hot plugging. Just like a
normal USB device, just plug it into the computer's USB port and plug in the
memory card to use it. According to the speed, there are USB1.1, USB2.0
and USB3.0, which are divided according to the purpose, and have a single card
reader and an all-in-one card reader.
0 Comments