What Is the Difference Between PCI and PCIe Slots?

Personal computer (PC) expansion cards are used to add additional functionality to a computer. They are typically used to add graphics, sound, or network capabilities.

There are two main types of expansion slots for PC cards: Peripheral Component Interconnect (PCI) and Peripheral Component Interconnect Express (PCIe).

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PCI slots were the first type of expansion slot available on computers. They were introduced in 1992 as a part of the PCI bus standard.

PCI slots are found on almost all types of computers, from desktop and laptop PCs to servers and workstations.

PCIe slots are the newer version of the PCI slot and were introduced in 2004. PCIe slots support a much higher bandwidth than PCI slots and are the preferred type of expansion slot for graphics cards, sound cards, and network cards.

PCIe slots are found on most newer computers.