What does PCIe-x16 really mean and how many do I need?

What does PCIe-x16 really mean and how many do I need? pcie x16 expansion slot MAIWO KT058 NVME SSD Adapter Expansion Card, NVMe to PCIe X4 X8 X16 Slot Quad NVMe to PCIe 16x Adapter, RIITOP 4 Port NVMe SSD Slot pcie2 slot Today, PCIe has attracted an upsurge of excitement for this technological innovation whether it be SSDs, GPUs, motherboards or high-powered expansion cards

pcie2 slot SATA 3 Expansion Cards; Network Adaptors; Video Capture Cards PCIe x8 & PCIe x16 Slots:

pcie 8x slot Enhance your PC's performance with the PCI Express x16 riser cable, a versatile PCIe-Bifurcation card that splits a single x16 slot into four x4 slots, x16 The smallest slots are used by low-demanding cards whereas the larger x16 slot is