Alternatively referred to as an add-on card, expansion board, internal card, interface adapter, or just card. An expansion card is an electronic board or card added into the expansion slot of a desktop computer or other non-portable computer to give that computer a new ability, such as the ability to connect to another computer using a network cable.
Types of expansion cards in a computer
- Interface card (ATA, Bluetooth, EIDE, Firewire, IDE, Parallel, RAID, SCSI, Serial, and USB)
- MPEG Decoder
- Network Card
- Sound Card
- Video Card
- Video capture card
Expansion card example
As can be seen in the picture above, every expansion card has two main components, the first is the gold plated connector that connects to a expansion slot on the motherboard and the back metal plate that is visible from the back of the computer. Typically the back metal plate has connections that allow an outside device to communicate with the card and computer. In this example, the modem has two RJ-11 jacks that allow it to communicate over a phone line.
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