What Should to Do With Extra PCIe Slots?

I explain in this video what devices PCIe x1 slots are used for on a motherboard I also attempt

The width of a PCIe connector is mm, while the height is mm, and the length is variable The 'minor' half of the connector is mm

x16 slot This will list the maximum rates in bits and bytes respectively PCI-E x1 is rated for 8Gbps MBs Your typical

x16pciexp slot This will list the maximum rates in bits and bytes respectively PCI-E x1 is rated for 8Gbps MBs Your typical