The motherboard is just the interconnect to every device in your computer. The (AMD) CPU holds all the key assets.
But apart from PCI-4.0, 5x0 doesnt offer that much benefit on top of a 4x0 board. Even a high-end 12 core CPU works perfectly fine on a 50$ budget board: https://www.techpowerup.com/review/amd-ryzen-9-3900x-tested-on-cheap-b350-motherboard/
Its because AMD changed the rules related to mobo vendors. They have to build a proper VRM in the first place to prevent a clusterfuck that happend on the FX platform, where motherboards where incapable of providing proper power to faster FX CPU´s (Causing throttling, lower performance).
But apart from PCI-4.0, 5x0 doesnt offer that much benefit on top of a 4x0 board. Even a high-end 12 core CPU works perfectly fine on a 50$ budget board: https://www.techpowerup.com/review/amd-ryzen-9-3900x-tested-on-cheap-b350-motherboard/
Its because AMD changed the rules related to mobo vendors. They have to build a proper VRM in the first place to prevent a clusterfuck that happend on the FX platform, where motherboards where incapable of providing proper power to faster FX CPU´s (Causing throttling, lower performance).