Table 43. System setup options—Preboot Behavior menu
Preboot Behavior
Adapter Warnings
Enable Dock Warning Messages Enables the warning messages during boot when the adapters with less power
capacity are detected.
By default, the Enable Dock Warning Messages option is enabled.
Warnings and Errors Enables or disables the action to be taken when a warning or error is
encountered.
By default, the Prompt on Warnings and Errors option is selected. Stop,
prompt, and wait for user input when warnings or errors are detected.
NOTE: Errors deemed critical to the operation of the computer hardware
stop the functioning of the computer.
USB-C Warnings
Enable Dock Warning Messages Enables the warning messages during boot when the USB-C adapters with less
power capacity are detected.
By default, the Enable Dock Warning Messages option is enabled.
Fastboot Allows you to configure the speed of the UEFI boot process.
By default, the Thorough option is selected. Performs complete hardware and
configuration initialization during boot.
Extend BIOS POST Time Sets the BIOS POST (Power-On Self-Test) load time.
By default, the 0 seconds option is selected.
MAC Address Pass-Through Replaces the external NIC MAC address (in a supported dock or dongle) with the
selected MAC address from the computer.
By default, the System Unique MAC Address option is selected.
Table 44. System setup options—Virtualization menu
Virtualization Support
Intel Virtualization Technology
Enable Intel Virtualization Technology (VT) When enabled, the computer can run a Virtual Machine Monitor (VMM).
By default, the Enable Intel Virtualization Technology (VT) option is enabled.
VT for Direct I/O
Enable Intel VT for Direct I/O When enabled, the computer can perform Virtualization Technology for Direct
I/O (VT-d). VT-d is an Intel method that provides virtualization for memory map
I/O.
By default, the Enable Intel VT for Direct I/O option is enabled.
DMA Protection
Enable Pre-Boot DMA Support Allows you to control the Pre-Boot DMA protection for both internal and external
ports. This option does not directly enable DMA protection in the operating
system.
NOTE: This option is not available when the virtualization setting for IOMMU
is disabled (VT-d/AMD Vi).
By default, the Enable Pre-Boot DMA Support option is enabled.
For additional security, Dell Technologies recommends keeping the Enable Pre-
Boot DMA Support option enabled.
BIOS Setup 115
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