What is PCI Express? Do PCIe lanes, slots, and versions matter?

Slot Size refers to the size of the physical PCIe slot Lane Width refers to the number of PCIe lanes supported by the physical slot Larger slots can support

​Table 1 shows the scalable bandwidth that PCI Express delivers for different lane widths compared to PCI For example, a x1 PCI

pcie slot for gpu PCIE3 is used for PCIe x4 lane width graphics cards • PCIE4 is used for PCIe x1 lane width cards •

pcie m2 slot PCI Express slots on the motherboard can be wider then the number of lanes connected For example a motherboard can have x8 slot with only x1