Best ITX Board for 9900K - ASRock Z390 Phantom ITX Tested - YouTube
Asrock Z390 Phantom Gaming-ITX/ac, VLP ram, Noctua NH-L12 w/ 120 x 25mm fan mounted on bottom side - ready for a Ghost S1 : r/sffpc
Used - Very Good: ASRock Z390M-ITX/ac LGA 1151 (300 Series) Intel Z390 HDMI SATA 6Gb/s USB 3.1 Mini ITX Intel Motherboard Intel Motherboards - Newegg.com
ASRock Z390 Phantom Gaming ITX/ac Overview - Tiny at $200: ASUS Z390-I Gaming vs. ASRock Z390 Gaming-ITX/ac Review
Used - Very Good: ASRock Z390M-ITX/ac LGA 1151 (300 Series) Intel Z390 HDMI SATA 6Gb/s USB 3.1 Mini ITX Intel Motherboard Intel Motherboards - Newegg.com
ASRock Z390 Phantom Gaming ITX/ac Overview - Tiny at $200: ASUS Z390-I Gaming vs. ASRock Z390 Gaming-ITX/ac Review