Well here is the first Mini-ITX AM4 motherboard that we’ve seen! It is from BIOSTAR and is the Racing X370-GTN, which is based off AMD’s top of the line X370 chipset. The board draws power from 24-pin ATX and 4-pin CPU power connectors and has a 7-phase VRM.
This board does support all Ryzen CPU models, although it will be interesting to see how XFR will work on a board with such slim power inputs. There are two DDR4 DIMM slots which support 32GB of dual-channel DDR4-2666 memory. There is a single PCI-Express x16 slot, a 32 Gb/s M.2 slot (reverse side), four SATA 6 GB/s ports, and a USB 3.0 header.
The board also features Realtek DragonLAN GbE controller and HD audio (115 dBA SNR CODEC). No word yet on pricing or availability.