For MSI X299 XPOWER GAMING AC Motherboard LGA 2066 DDR4 E-ATX Mainboard | eBay
NeweggBusiness - GIGABYTE X299-WU8 LGA 2066 Intel X299 Motherboard with 7 PCIe x16 Slots and Dual Intel Server LAN
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 ...