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How-To Geek

Expansion Card

Expansion cards are add-on circuit boards that expand the functionality of a computer. While there have been numerous variations on expansion card designs going back to the 1970s, the current standard is the PCI/PCI Express format. Computer motherboards (excluding laptops and very small form-factor micro desktop models) have expansion ports that allow you to add in additional hardware in order to add or improve a wide variety of functions on the computer such as better sound, additional ports for USB devices, upgrading to a better quality Ethernet card, and more.

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