Anandtech published An AMD Threadripper X399 Motherboard Overview: A Quick Look at Seven Products
A quote from the article:
With the release of AMD's Threadripper CPUs into the HEDT market, board partners have released new motherboards based on the X399 chipset. Consumers are going to see quad channel memory, native 4-Way SLI and CrossfireAn AMD Threadripper X399 Motherboard Overview: A Quick Look at Seven Products @ Anandtech