Select the Del tab from the Z390 DESIGNWARE startup screen to enter the Advanced Mode setupscreen. Select CSM Support items in the Boot option of the screen to go to enable the Compatibility Support Module configuration. The “Storage Boot Option Control” allows user to select whether to enable the UEFI or legacy option ROM for the storage device controller. This item is configurable only when CSM Support is set to “Enabled”. Please change the “Storage Boot Option Control” setting from “UEFI” to “Legacy”.
Tags: ARC-1886, BIOS