Sure does, worked on the board i'm selling at rated speeds and timings using the XMP profile as well as another X370 board same rated speeds and timings. Of course YMMV on Ryzen 1.0 when it comes to RAM speeds..etc.
TTT, ITX Ryzen motherboard remaining and that's a wrap until the fall when Intel releases the newest CPUs.
Again, this board was tested with both Ryzen an Ryzen 2 and DDR4 3200 with zero issues. Great board for the price and for that user that wants an SFF system.