The ASRock Rack B550D4-4L, a B550 Motherboard with BMC
 

ASRock Rack, the professional arm of ASRock, has launched an interesting B550 model which is aimed at the server and workstation market, but uses the mid-range chipset. The ASRock Rack B550D4-4L benefits from support for AMD's latest Ryzen 5000 series of processors, with a BMC controller, support for up to 128 GB of non-ECC DDR4-3200 memory, and includes a single PCIe 3.0 M.2 slot from the chipset.

https://www.anandtech.com/show/16349...board-with-bmc