Computer Hardware and Functions

Computer hardware (computer hardware) is the physical components can be seen, touched and shaped concrete forming one unified system Personal Computer (PC).

The function of these devices is very varied, such as input devices, output devices, a data processing device, as well as additional tools / accessories with a variety of additional functions which do not always exist in all the PC system. Fungsi excel

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Typically these devices are assembled, largely put into a computer case and others were outside casing.

Miscellaneous Computer Hardware include:

1.  Motherboard (main board)

Motherboard / mainboard is the main component of which is to build a computer. Shaped square board with slots for inserting other components. Its function is to connect all components of the PC. Computer hardware everything else attached directly to the motherboard slot or at least connected using a cable.

2.  Central Processing Unit (CPU)

Ordinary also known as “processor” or “brain” of the computer. The function of the CPU is processing and processing all the calculations and commands that enable computers to operate. Because of the heat it generates, the CPU is always equipped with a fan and heat sink to reduce the temperature. In the latest CPU types, already equipped with the Graphic Processing Unit (GPU) integrated into the CPU, a graphics processing data.

3. Random Access Memory (RAM)
RAM serves as a transit point to provisional data for the operations being executed by the CPU. RAM is volatile, which means that this device does not store data permanently, only for the required operation only. The capacity of the RAM on a PC that often we find quite diverse, ranging from 256 MB (megabytes) – 16 GB (GigaBytes)

4. Video Graphic Array (VGA)

VGA card or graphics card serves as a link that allows the sending of data between the PC and the graphical display device such as a monitor or projector. Most computers have a separate VGA as expansion cards installed on the motherboard slot. But there is also a computer with an integrated VGA on the motherboard or on its CPU.

5. Hard Disk Drive(HDD)

Hard-disk serves as a main data storage in a computer system. Operating systems, applications, and documents stored on the hard-disk of this. In the latest PC, there are also new hardware called Solid State Drive (SSD). Functions the same as the hard-disk, but offers speeds faster data transfer.

6. Optical Disc Drive

Optical drive is also commonly known as the CD drive, DVD drive, or ODD. The function of this device is to read and store data to and from optical disc media such as CD, DVD, or Blu-Ray Disc.

7. Power Supply Unit (PSU)

Power Supply serves as converters and distributors of electrical energy from the power outlet (eg PLN) to a form of electrical energy that can be used to run computer components inside the casing. Typically, this PSU is placed at the rear of the casing.

Aside from computer hardware contained within the casing, there are also common components we saw outside the casing:

8. Monitor

Also called a screen or display. The function of the monitor screen is for displaying video and graphics information generated from a computer via a tool called the graphics card (VGA Card). This monitor physical form is almost the same with television, television is usually only capable of displaying graphical information with the size of the higher resolution.

9. Keyboard and Mouse

Keyboard and mouse input serves as a tool to enter text commands, character, or move objects in a graphical interface for processing by a computer. The size and shape of both of these tools are quite diverse, but its function is the same.


Outside of the components we have already mentioned above, there are also computer hardware with additional functions that not all computer systems have:

10. Uninterruptable Power Supply (UPS)

Often referred to as a battery backup, UPS main function is to save and provide backup electricity to be used when the main power source goes out. Aside from being a power backup, most UPS also serves as a “stabilizer” that regulate the flow of electricity in order to comply with the required.

11. Printer and Scanner

Printer serves as a print output of electronic documents both text and graphics. In home computers typically use paper as the print media. While the scanner function is the opposite of a printer that scans the data input from the outside of the computer into an electronic form that can be processed digitally.

12. Speaker

The function of the speakers is as a sound output generated from the computer. In addition to the speakers, often we find people who use headphone / headset as the sound output device.

13. Sound Card (voice)

Functions as a liaison between the computer and audio output devices such as speakers

14. Modem

This tool is used to connect a computer to the Internet

15. LAN Card

Functions as liaison computers in a network.

Thus has been described a general overview of computer hardware and various functions. For more in one by one about these components please refer to Article Index . May be useful for you all.

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