Computer Hardware

System Unit

Learning Outcome

• Student should be able to:– Identify the component of a system unit– State the functions of the main components of a

system unit.

Note ActivityNote 1

Note 2

Activity 1

Activity 2

Identify the components of a system unit

• Inside view of system unit

• Front layer of a system unit

• Input / output port ( I/O port)

Inside view of system unit

Front layer of a system unit

Input / output port ( I/O port)

Function of the main components of a system unit

Components Functions

Input / output port Peripheral can send data to or receive information from the computer.An external device, such as a keyboard, monitor, printer, mouse and microphone is often attached by a cable to a port on the system unit.

Power button To start on computer

Reset button Kick of soft boot, instructing the computer to go through the process of shutting down, which would clear memory and reset devices to their initialized state. It simply removes power immediately.

Motherboard Main circuit board of the system unit. Which has some electronic components attached to it and other built into it

Power supply Convert standard electrical power into the form that computer can use. If a power supply is not providing the necessary power, the computer will not function properly.

DVD-ROM drive A device that reads DVD-ROM , also can read audio CDs, CD-ROMs, CD-Rs and CD-RWs

CD-ROM drive A device that reads audio CDs, CD-ROMs, CD-Rs and CD-RWs.

DVD/CD-RW drive It is a combination drive that reads DVD and CD media. It is also writes to CD-RW media. This drive also allows watching a DVD or burn a CD.

Zip drive A high capacity disk drive that reads from and writes on a Zip disk.

Floppy drive A device that reads from and writes on a floppy disk

Hard disk drive Type of storage device that contains one or more inflexible =, circular platters that store data, instructions and information. Also called a hard disk.