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docs: add example use cases for expansion cards 

-added several examples of modern use cases for expansion cards and reasons for utilizing them
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Ginson Wong 2018-10-13 11:07:43 -07:00 committed by Kristofer Koishigawa
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client/src/pages/guide/english/computer-hardware/expansion-cards/index.md
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@ -7,6 +7,12 @@ The primary purpose of an expansion card is to provide or expand on features not
In the case of expansion of on-board capability, a motherboard may provide a single serial RS232 port or Ethernet port. An expansion card can be installed to offer multiple RS232 ports or multiple and higher bandwidth Ethernet ports. In this case, the motherboard provides basic functionality but the expansion card offers additional or enhanced ports. The most common expansion card used today is the grapics card.
### Modern example use cases for Expansion Cards
* Graphics Card - (mentioned above) provides additonal graphics capabilities for programs that utilize graphics intensive workloads such as 3D rendered games and business applications. Note that many modern graphics cards support running in tandem with other graphics cards in the same machine, enabling significant gains in graphics performance.
* USB Card - provides additional USB ports of varying connector type sizes and versions (USB2.0. USB3.0, USB-C) to accomodate plug in peripherals and devices to a computer
* RAID Controller Card - provides the ability to utilize RAID configurations with your hard drives, enabling complex disk configurations to meet specific user needs (RAID-1 for redundancy for example)
* Sound Card - if the motherboard doesn't include basic sound capabilities (less common), a sound card can be purchased to add audio capabilities. Another reason for using a Sound Card are more audio input options (SPDIF & Multichannel Connectors) or additional audio fidelity options that go above and beyond what basic sound capabiitlies are provided by the motherboard.
#### More Information:
<!-- Please add any articles you think might be helpful to read before writing the article -->
* <a href='https://en.wikipedia.org/wiki/Expansion_card' target='_blank' rel='nofollow'>Expansion Cards</a>