What is the difference between a PCIe x1, x4, and x16 slot

1 additional PCI-Express x1 slot is needed x1 pcie slot Dell XPS 8700 comes with a one PCIe x4 slot on the systemboard You can refer to picture below for it x16pciexp slot you will need at least a pcie x16 or pcie x8 to prevent bottlenecks a pcie x1 slot will most definitely reduce PPD from the card on it

x16 slot This PCIe x1 to PCIe x16 Slot Extension adapter provides enhanced compatibility between motherboards and a variety of PCI Express expansion cards, allowing you