Dell XPS 16 9640 Owner's Manual page 101

Table 42. BIOS Setup options—Virtualization menu (continued)
Virtualization Support
Enable OS Kernel DMA Support
Table 43. System setup options—Performance menu
Performance
Multi-Core Support
Multiple Atom Cores
Intel SpeedStep
Enable Intel SpeedStep Technology
C-State Control
Enable C-State Control
Enable Adaptive C-States for Discrete
Graphics
Intel Turbo Boost Technology
Enable Intel Turbo Boost Technology
Intel Hyper-Threading Technology
Enable Intel Hyper-Threading Technology
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 disabled.
NOTE: This option is provided only for compatibility purposes, since some
older hardware is not DMA capable.
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 disabled.
NOTE: This option is provided only for compatibility purposes, since some
older hardware is not DMA capable.
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 Active option is selected.
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.
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 Enable C-State Control option is enabled.
Enables or disables the feature to dynamically detect high usage of a discrete
graphics and automatically adjusts system parameters for higher performance.
By default, the Enable Adaptive C-States for Discrete Graphics option is
enabled.
NOTE: The Hybrid Graphics/Advanced Options is applicable to computers
shipped with integrated and discrete graphics controllers.
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 Enable Intel Turbo Boost Technology option is enabled.
Enables the Intel Hyper-Threading mode of the processor. When enabled, the
Intel Hyper-Threading increases the efficiency of the processor resources when
multiple threads run on each core.
BIOS Setup 101