Sat 24 October 2020

Expansion Slots And Expansion Cards

The expansion slot is a socket that is mounted on a motherboard to insert the circuit board. Different circuit boards are inserted into the motherboard to add new devices and enhance capabilities to the computer. Some examples are memory chips, sound devices, modems or graphics cards, etc. A circuit board is identified by different terms like the card, expansion card, expansion board, adapter card, interface card, add-in, and add-on, etc.

Some cards contain a built-in feature or devices like modem card and graphics card, some cards are attached to a device outside the system unit like scanner, etc.


Types of Expansion Cards

Different types of expansion cards are as follows:

  1. Video Card: It is also called a video adapter or graphics card. It converts computer output into a video signal and sends it to the monitor to display.
  2. Sound Card: It enhances the sound-generating capabilities of a computer. It allows sound to be input through microphone and output through speakers.
  3. Network Interface Card (NIC): it is also called network cud. It is a communication device that allows a computer to communicate via a network.
  4. Modem Card: It is also called an internal modem. It is a communication device that enables computers to communicate via telephone lines or other means.


PC Cards & Flash Memory Cards

The PC Card is a thin credit card size device. It is used to add memory, disk drives, sound, fax/modem, communications, and other capabilities to a mobile computer like a laptop. All PC Cards follows the standard developed by PCMCIA, It stands for Personal Computer Memory Card International Association.

Types of PC Cards

  1. Type I Card: It adds memory capabilities to the computer.
  2. Type II Card: It contains communication devices such as a modem
  3. Type III Card: It deals with devices like hard disks. It is the thickest card.

PC Card and flash memory cards can be attached to the computer without opening the system unit and restarting the computer. The operating system automatically detects the PC Card and flash memory card as it is attached to the system. This feature is called hot-plugging or hot-swapping. This allows the user to add and remove devices while the computer is running.