While the video card added to the computer enhances the 3D graphics processing power of the computer, the sound card improves the audio output of the computer. The primary objective of the expansion card is to add to the functionality of the desktop computer through an expansion bus that is usually not offered by the motherboard itself. A couple of common examples of expansion cards are video cards and sound cards. The electronic circuit board inserted in an expansion slot of the motherboard of a computer is called an expansion card.
Understanding Expansion Card in Computer.
