Dell OptiPlex Small Form Factor 7020 Owner's Manual page 126

Table 43. System setup options—Virtualization menu (continued)
Virtualization Support
Enable Intel VT for Direct I/O
DMA Protection
Enable Pre-Boot DMA Support
Enable OS Kernel DMA Support
Table 44. System setup options—Performance menu
Performance
Multi-Core Support
Multiple Atom Cores
Intel SpeedStep
Enable Intel SpeedStep Technology
C-States Control
Enable C-State Control
Intel Turbo Boost Technology
Enable Intel Turbo Boost Technology
Intel Hyper-Threading Technology
126 BIOS Setup
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.
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.
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.
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.
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 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.
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