![]() ![]() NOTE: The following options may allow devices that are connected to the Thunderbolt adapter during preboot to function in the operating system. When disabled, this setting prevents PCIe device Option ROMs from running during preboot for PCIe devices that are connected behind the Thunderbolt adapter.When enabled, this setting allows PCIe devices that are connected through a Thunderbolt adapter (that is PCIe devices behind the Thunderbolt adapter) to perform the PCIe device’s UEFI Option ROMs (if present) during preboot.Enable Thunderbolt Adapter Preboot Modules (Disabled by default).As long as the device remains connected, it continues to function within the operating system, regardless of the Security Level set in the BIOS. When this setting is enabled, any Thunderbolt adapter peripherals and USB devices that are connected to the Thunderbolt adapter port before booting the computer can be used in preboot. However, setting this to "Enabled" overrides the Security Levels used within the operating system. (Includes USB boot support.) This allows Thunderbolt adapter peripheral devices and USB devices that are connected to the Thunderbolt adapter to be used during BIOS preboot. When enabled, the following Thunderbolt adapter features are enabled during Preboot: Adapter boot support for Thunderbolt and the USB device on Thunderbolt adapter support. ![]() Enable Thunderbolt Boot Support (Disabled by default).When disabled, the Thunderbolt Technology feature is disabled, and any connected Thunderbolt adapter devices are not available in preboot or within the operating system.When enabled, the Thunderbolt Technology feature and associated ports and adapters are enabled.Enable Thunderbolt Technology Support (Enabled by default).If Dell BIOS is used in your computer, you may find the below Control options on the Thunderbolt Configuration page in your BIOS Setup: ![]()
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