How to Install a PCI Card: 11 Steps (with Pictures)

pci slotPCIe Slot Structure. All PCIe slots are divided into two parts by a small protrusion in the middle separating them. This is why PCIe expansion cards, such as graphics cards,The top slot on your motherboard will typically be the best place to mount your graphics card, as this is most often the slot that runs at the full 16x speed.