You may be able to get PCIe 4.0 on these ASUS X470 and B450 boards

You may be able to get PCIe 4.0 on these ASUS X470 and B450 boards

Board makers may try to add support for PCIe 4.0 on the AMD 400-series chipsets after all.
AMD B450 motherboard round-up: Overclocking for the masses

AMD B450 motherboard round-up: Overclocking for the masses

All the AMD B450 boards announced so far from the major manufacturers.
AMD introduces new B450 chipset for mainstream users

AMD introduces new B450 chipset for mainstream users

The B450 chipset replaces the B350 chipset in the mainstream segment.