What are PCIe Slots in PC?

Types of PCIe Slots PCle Lanes pcie 3 0 x1 slot See, the configuration is like this 1 Slot 1 = PCIe x16 slot at x16 speed I have my GPU connected to it 2 Slot 2 = pcie x 16 slot slots in both motherboards is PCIe x1 I had installed an aftermarket card into the PCIe x1 of the 2019 Envy to add rear USB-3 and USB-C ports In the 2019

pcie slot height 1 x PCIe x16 PCIe x16 2 x PCIe x16 1 x PCIe x16 PCIe x1 5 x PCIe x1 3 x PCIe x1 2 x PCIe x1 1 x PCIe