What is an expansion card?
What can it be used for?
If you want to find the answers, then you are in the right place.

In this post, MiniTool has gathered much information about the expansion card, so read it carefully.
What Is an Expansion Card?
What is an expansion card?
The expansion card can also be called as expansion board, adapter card, or accessory card.
It is a printed circuit card/board used to add other functions to the computer system via an expansion bus.
All expansion cards are used to enhance the quality of their specific functions.
For instance, a video graphics card is used to enhance the video quality on the computer.
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However, the video card and sound card are still used to customize the PC.
For instance, the original IBM PC did not possess onboard graphics or hard drive capabilities.
In that case, the graphics card and ST-506 harddrive controllercard offered graphics capability andhard drive interfacesrespectively.
Expansion cards can be installed to provide multiple RS232 ports or multiple higher bandwidth Ethernet ports.
Under the circumstances, the motherboard provides basic functions, while expansion cards provide additional or enhanced ports.
They establish electrical contact between the electronic on the card and the motherboard.
Peripheral expansion cards usually have connectors for external cables.
In PC-compatible personal computers, these connectors were located in support brackets on the back of the cabinet.
19 or more expansion cards can be installed in the backplane system.
Total power consumption and heat dissipation become limiting factors when many expansion cards are added to the system.
Some expansion cards occupy over one slot space.