What exactly does the spec “PCIe x16 slot ” mean?

PCIe x4 Slots 0 PCIe x1 Slots 1 PCI Slots 0 Slots 228022110 M 1x HDMI slot

The most common PCIe slot currently in use are PCIe x16 slots, PCIe x4 slots, and PCIe x1 slots as shown in the picture below This

halo slot 22802242 M-Key x 2, 30423052 B-Key x 1 + Micro SIM Slot x 1, Mini PCIe x 1 + Micro SIM Slot x 1 PCIe x 1 PCI

slot gratis sin descargar 2 Key M 2280 with PCIe x4 NVMe SSD slot; 1 x Micro SD slot Expansion 1 x MIPI CSI-2 connector ; 1 x Full-size PCI