Support
I am looking for the “Control Iommu Pre-boot Behavior” or “Pre-boot DMA Protection” option in BIOS. Where can I locate this option in the BIOS interface?(2/13/2026)
The option name varies across different platforms. Please refer to the following screenshots to identify the correct option and its location in the BIOS menu.
Intel platform
● W680 / Z690 series
[BIOS SETUP] – [Advanced] – [Chipset Configuration]
● W880 / Z890 / W790 seriess
[BIOS SETUP] – [Advanced] – [Chipset Configuration]
Note:
- Please first update BIOS to the latest version to obtain the option on the above platforms.
- Users can enable the option if encounter security related problems.