Please update the latest BIOS from ASRock official website firstly.
Download link: http://www.asrock.com/support/download.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.
M.2 specification support may vary with a different AM4 motherboard. Please refer to the following table for support information.
Please refer to the following table for detail information.
CPU Frequency Multiplier Change option is already supported by the new BIOS update.
Since AMD AM4 is a new structure and we just found BIOS cannot be completely updated by our Instant Flash. Thus, for the old BIOS version released before 2017/03/07, there is no “Instant Flash” option under BIOS.
To make sure BIOS update can be executed completely, please use DOS or Windows BIOS update methods to do update temporarily.
Please download ASRock RGB LED Utility from the following link, and the LED can be controlled under OS.
Normally, the boot time for AM4 series motherboards is around 30-45 seconds.
Boot time may be longer if clearing CMOS or boot up from getting AC power firstly.
If you change any setting in BIOS and want to update the BIOS, please enter BIOS setup to load default setting. After reboot, please update the BIOS.
Please refer to the following table for the fan type specification and information.
*Auto detect – system will automatically detect the fan type installed, so user doesn't set "DC or PWM" mode additionally under BIOS setup.
The voltage setting option for Ryzen CPU is supported by the new BIOS update.