Question: The system doesn't boot properly after loading DRAM XMP Profile on AM4 motherboards. How do I do?(3/1/2017) Answer: Please update the latest BIOS from ASRock official website firstly.
Download link: https://www.asrock.com/support/index.asp?cat=BIOS
Because of AM4 memory compatibility issue, some high frequency memory modules may not work with XMP profile successfully. ASRock keeps updating the latest AMD AGESA code to enhance the high frequency memory capability. Please keep tracking the latest BIOS update on ASRock official website.
We have tested some memory modules on AM4 platform and users can refer to our suggested module list for choosing the finest ones to pair with your AM4 motherboard.
Memory support list link: X370 Professional Gaming, X370 Taichi, X370 Killer SLI/ac, X370 Killer SLI, X370 Gaming K4, AB350 Pro4, AB350M Pro4, AB350 Gaming K4