PCIe (Peripheral Component Interconnect Express) slots on motherboards are essential for connecting various expansion cards, such as graphics cards, network cards, and SSDs. These slots enhance the capabilities of your computer by allowing for upgradable components.
There are several types of PCIe slots, identified by their lane counts: x1, x4, x8, and x16. The number of lanes determines the bandwidth and performance potential of the connected device.
PCIe slots are used for connecting expansion cards to the motherboard, enabling enhancements in graphics, storage, and connectivity.
You can check your motherboard's specifications or visually inspect it for long slots with a plastic latch at one end.