Dell Pro 14 Essential PV14255 handleiding

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Table 18. BIOS Setup options—Virtualization menu(continued)

Virtualization Support

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.

Intel Trusted Execution Technology (TXT) Intel Trusted Execution Technology (TXT) is a set of hardware extensions to Intel

processors and chipsets. It provides a hardware-based root of trust to ensure

that a platform boots with a known good configuration of firmware, BIOS, virtual

machine monitor, and operating system. The following must be enabled in order

to enable Intel TXT -

● Intel Virtualization Technology - X

● Intel Virtualization Technology - Direct

By default, the Intel Trusted Execution Technology (TXT) option is enabled.

For additional security, Dell Technologies recommends keeping the Intel Trusted

Execution Technology (TXT) option 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.

NOTE: This option is provided only for compatibility purposes, since some

older hardware is not DMA capable.

Enable OS Kernel DMA Support Allows you to control the Kernel DMA protection for both internal and external

ports. This option does not directly enable DMA protection in the operating

system. For operating systems that support DMA protection, this setting

indicates to the operating system that the BIOS supports the feature.

NOTE: This option is not available when the virtualization setting for IOMMU

is disabled (VT-d/AMD Vi).

By default, the Enable OS Kernel DMA Support option is enabled.

NOTE: This option is provided only for compatibility purposes, since some

older hardware is not DMA capable.

Table 19. BIOS Setup options—Performance menu

Performance

Multi-Core Support

Multiple Atom Cores Allows to change the number of Atom cores available to the operating system.

The default value is set to the maximum number of cores.

By default, the All Cores option is selected.

Intel SpeedStep

Enable Intel SpeedStep Technology Enables the computer to dynamically adjust processor voltage and core

frequency, decreasing average power consumption and heat production.

By default, the Enable Intel SpeedStep Technology option is enabled.

128 BIOS Setup

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