The B550 chipset is the heart of the MSI B550M Pro-VDH WiFi motherboard and has been specially optimized for the Ryzen CPUs of the 3000 series Matisse and the 5000 series Vermeer.
B550 mainboards support all features of the Ryzen processors of the third and fourth generation, especially the PCI Express standard in version 4.0 (PCIe 4.0).