system unit
Functions of the main components of a system unit
No.
| Components | Functions |
1. | Input / Output port
(I/O port) | A port is the point at which a peripheral attaches to a system unit so
that the peripheral is able to send data and receive information from
the computer.
An external device, such as a keyboard, monitor, printer, mouse
and microphone, that is attached by a cable to a port on the system
unit.
The back of the system unit contains so many ports. Some newer
personal computers also have ports on the front of the system unit.
Ports have different types of connectors. A connector joins a cable
to a peripheral. One end of a cable attaches to the connector on the
system unit and the other end of the cable attaches to a connector
on the peripheral. |
2. | Power button | To turn the computer on |
3. | Reset button | Restating the computer, instructs the computer to go through the
process of shutting down, which would clear the memory and reset
devices to their initialized state. It simply removes power
immediately. |
4. | Motherboard | Main circuit board of the system unit, it has some electronic
components attached to it. |
5. | Power Supply | Converts standard electrical power into a form that, the computer
can use. If a power supply is not providing the necessary power,
the computer will not function properly. |
6. | DVD-ROM drive | A device that reads DVD-ROM, audio CDs, CD-ROMSs, CD-Rs
and CD-RWs. |
7. | CD-ROM drive | A device that reads audio CDs, CD-ROMs, CD-Rs and CD-RWs. |
8. | DVD/CD-RW drive | A combination drive that reads DVD and CD media, and writes to
CD-RW media. |
9. | Zip drive | A high-capacity disk drive that reads from and writes on a Zip disk. |
10. | Floppy drive | A device that reads from and writes on a floppy disk |
11. | Hard disk drive | A Type of storage device that contains one or more inflexible,
circular platters that store data, instructions and information. |
