for what can be PCI slot can be used for? : rbuildapc

pci slotLearn about PCIe slots, the interface that connects hh-speed components to your motherboard. Find out the different sizes, lanes, generations, and compatibility of PCIe slotsThe 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.