Table 39. System setup options—Virtualization menu(continued)
Virtualization
● Intel Virtualization Technology - X
● Intel Virtualization Technology - Direct
Enable Intel Trusted Execution
Technology (TXT)
By default, the OFF option is enabled.
For additional security, Dell Technologies recommends enabling the Intel
Trusted Execution Technology (TXT) feature.
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 ON 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 ON option is enabled.
NOTE: This option is provided only for compatibility purposes, since some
older hardware is not DMA capable.
Table 40. System setup options—Performance menu
Performance
Multi-Core Support
Multiple Atom Cores Enables 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 ON option is enabled.
C-States Control
Enable C-State Control Enables or disables the ability of the CPU to enter and exit low-power state.
When disabled, it disables all C-states. When enabled, it enables all C-states
that the chipset or platform allows.
By default, the ON option is enabled.
Intel® Turbo Boost Technology
Enable Intel® Turbo Boost Technology Enables the Intel TurboBoost mode of the processor. When enabled, the
Intel TurboBoost driver increases the performance of the CPU or graphics
processor.
By default, the ON option is enabled.
92 BIOS Setup
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