Can someone clarify PCIe terminology of the B450 TOMAHAWK

A PCIe x2 slot provides two lanes and transmits data at 2 bits per PCIe PCIe and cards seamlessly plug into PCIe

But PCIe and PCIe are outdated Today, PCIe is For example, a PCIe SSD with four lanes can be inserted into a x16 slot

pcie 4 m2 in pcie 3 slot This video explains everything you need to know about PCIe slots, including PCIe slot 2

pcie slot sizes PCIe x16 , PCIe x1 , PCIe x16 , PCIe x8 , PCIe x16 , PCIe x4 , PCIe x8 , PCIe x16 , PCIe x8 (