Computer System Unit Parts
The Computer System Unit
The system unit is the box-like case that contains major computer’s electronic components which many people erroneously refer to the CPU. Inside this box like case you will find devices like the power supply, the drives, fan, connectors, and the motherboard to mention but a few. Note that in most cases the monitor also known as display, keyboard and mouse will not be found inside the system unit layout.
The system unit is sometimes called computer chassis, cabinet, box, tower, enclosure, housing, system unit or simply case.
Parts of the System Unit in Computer
The system unit of any desktop computer houses many components. These are some of the major components you are going to find inside your system unit. If you think of checking these components, make sure you power off your computer and disconnect it from the mains.
Then locate the top lid of your system unit and remove it so that you can access the inside of your base unit. Be careful not to mess with your components if you are not very familiar with them. Before touching your components, take care of the ESD precautions.
Computer Base Unit
The Computer Motherboard
The motherboard is sometimes called the system board or main board. It is the main circuit board of a microcomputer. The motherboard contains the connectors for attaching additional boards. All the computer components connects in one way or the other with the motherboard.
Typically, the motherboard contains the CPU, BIOS, memory, mass storage interfaces, serial and parallel ports, expansion slots, and all the controllers required to control standard peripheral devices, such as the display screen, keyboard, mouse and disk drive.
When you are reading about motherboards you can not fail to come across the term motherboard form factors which describes its general shape, the type of case and power supply it can use, and its physical organization (layout of the motherboard).
A Computer Labeled Mainboard
Hard Disk Drive
A hard disk drive is a high capacity non volatile magnetic data storage media with a volume (disk) which is usually non-removable.
Data is magnetically read and written on the platter by read/write heads that float on a cushion of air above the platters.
A Hard Disk Drive
Floppy Disk Drive
Short for floppy disk drive (FDD), it is a disk drive that can read and write floppy disks although they are obsolete nowadays.
Floppy disk drives have been replaced by the USB flash disk drives.
Floppy Disk Drive
Power Supply Unit
The power supply unit (PSU) is used to convert AC current from the mains supply to the different DC voltages required by various computer components.
Standard power supplies turn the incoming 110V or 220V AC (Alternating Current) into various DC (Direct Current) voltages suitable for powering the computer's components.
Power supplies are quoted as having a certain power output specified in Watts, a standard power supply would typically be able to deliver around 350 Watts.
The more components (hard drives, CD/DVD drives, tape drives, ventilation fans, etc) you have in your PC the greater the power required from the power supply.
ATX Power Supply Unit
DVD-ROM, DVD Writer, CD-ROM Drive
It is a high capacity optical data storage device with a removable disk, it writes data onto or reads data from a storage medium.
A CD-ROM drive may be connected to the computer via an IDE (ATA), SCSI, S-ATA, Firewire, or USB interface or a proprietary interface.
CD ROM Drive
Check these links for more free computer lessons
- Introduction To Computer Networking
INTRODUCTION TO COMPUTER NETWORKING NETWORKING: -It is the art of connecting two or more computers in order to share peripherals (resources) e.g. printers, faxes, photocopiers, CD ROM, etc. and data.
- Computer Hardware Parts Explained
In this hub, computer parts explained, we are going to have a look at some of the parts that make up a computer. Computers are very useful electronic devices that we use in modern world.
- Different Computer Types
This hub answers the question:What is the difference between supercomputers, mainframe, mini and microcomputers? There are different computer types available depending on the number of users they can support simultaneously.
How To Identify The Components Inside Your Computer
Have you ever opened a desktop computer system unit?
© 2010 Patrick Kamau