Why do we need PCIe Bifurcation and how?

Bifurcation is needed to run multiple pcie devices on the same slot For example using a pcie x16 slot to hold 4 nvme drives This article

Figure 2 The standard PCI Express slot sizes on computers today are x1, x4, x8, and x16 Software compatibility is also ensured by the PCI

pciex1_1 slot The PCIe x1 slot is the smallest PCI Express slot and has the lowest throughput compared to larger PCIe slots such as the PCIe x16 slot However

pcie slot bracket For instance, on supported systems a PCIe x16 slot can be configured into two PCIe x8 lanes, or more smaller lanes, depending on what the