Question: If I want to change voltage in BIOS setting for Ryzen CPU on AB350 series motherboards, how do I do?(3/1/2017) Answer: The voltage setting option for Ryzen CPU is supported by the new BIOS update.
(BIOS ->OC Tweaker-> CPU frequency & Voltage Change-> Manual)
Please visit ASRock Download zone and update the BIOS to the following BIOS or later versions.
Download link: https://www.asrock.com/support/index.asp