This Kaby Lake-X-specific mid-range motherboard includes support for 4X DDR4-4133 RAM and 3-way SLI or Crossfire. Being marketed as a gaming product, it also comes with programmable RGB LEDs.
https://www.notebookcheck.net/Gigabyte-presents-the-Aorus-X299-Gaming-motherboard-specifically-designed-for-Kaby-Lake-X-CPUs.240294.0.html