PCIe VS : What are the differences and similarities?

PCIe Bifurcation pcie 2 slot Pretty much, its a 16x slot that runs at 4x electrically which means its going to have 14 the bandwidth You are going to lose a lot of pcie 1 slot PCIe cards that were working on older slots I want to know if I can use my old NI PCIe cards on the new computer because I'm not

pcie training error slot 1 EZ-Latch Plus：PCIe x16 slot & slots with quick release design; UC Ultimate Scalibility: 3*PCIe x16 slots for Multi-GPU and 4*PCIe x4 slots