MSI promise the “Best. Motherboard. Ever.” for their upcoming X299 range
ROG Strix X299-E Gaming II | Motherboards | ROG Global
You'll need a new X299 motherboard to run Intel's latest CPUs - The Verge
ASUS PRIME X299-A LGA2066 DDR4 M.2 USB 3.1 X 299 ATX Motherboard for Intel Core X-Series Processors : Electronics - Amazon.com
The MSI X299 Gaming Pro Carbon AC Motherboard Review
Amazon.com: Asus Prime X299- A II ATX Motherboard (Intel X299) LGA 2066, 12 IR3555 Power Stages, DDR4 4266 MHz, Triple M.2, USB 3.2 Gen 2 Type-C, Intel LAN and Aura Sync RGB Lighting : Electronics
Every Intel X299 motherboard revealed: Core i9 and Skylake-X's companions | PCWorld
For Sale] Asus Rampage VI Extreme Encore X299 Motherboard 325 Shipped | Overclock.net
New GIGABYTE X299-WU8 Workstation Motherboard: Dual PLX8747, but Built for Core-X?