Mighty Mini-ITX: ASRock X299E-ITX/ac with 4 Channel DDR4 and 3xM.2 Support
Asus Prime X299-a Ii Desktop Motherboard - PRIME X299-A II
ASUS Pro WS X299 SAGE II Intel X299 LGA 2066 Socket R4 CEB Motherboard
For Intel X299 ARock X299E ITX/AC Desktop Motherboard LGA 2066 DDR4 ram support Core X series PCI E 3.0 M.2 X299 USB3.1Mini ITX|Motherboards| - AliExpress
ROG STRIX X299 E GAMING Motherboard Onboard WIFI LGA 2066 new original+RAM+CPU set|Desktops| - AliExpress
Gigabyte X299-wu8 (rev. 1.0) Server Motherboard - X299-WU8