An AMD Threadripper X399 Motherboard Overview: A Quick Look at Seven Products
X399 DESIGNARE EX (rev. 1.0) Key Features | Motherboard - GIGABYTE Global
AMD Socket TR4 X399 Motherboards
Amazon.com: Asus Rog Zenith Extreme Alpha X399 HEDT Gaming Motherboard AMD Threadripper 2 (TR4) EATX DDR4 M.2 10G LAN USB 3.1 Gen2 : Electronics
ASRock > X399 Taichi
Amazon.com: ASUS PRIME X399-A AMD Threadripper TR4 DDR4 M.2 U.2 X 399 EATX HEDT Motherboard with USB 3.1 Gen2, AURA Sync RGB Lighting and 3D Printing Mounts : Everything Else