Table 37. System Setup options—Virtualization Support menu(continued)
Virtualization Support
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.
NOTE: To view this option, enable Advanced Setup mode as described in View
Advanced Setup options.
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.
NOTE: To view this option, enable Advanced Setup mode as described in View
Advanced Setup options.
Internal Port DMA Compatibility Mode Allows BIOS to notify the OS that the internal ports are not DMA capable.
By default, the Internal Port DMA Compatibility Mode option is disabled.
Table 38. System Setup options—Performance menu
Performance
Multi-Core Support
Active Multiple Performance Cores (P-
Cores) Select
Allows you to change the number of CPU cores available to the operating system.
By default, the All Active option is enabled.
Active Efficient Cores (E-Cores) Select Allows you to change the number of CPU E-Cores available to the operating system.
By default, the All Active option is enabled.
Intel SpeedStep
Enable Intel SpeedStep Technology Allows 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.
C-States Control
Enable C-State Control Enables the processors ability to enter and exit low power states.
By default, the Enable C-State Control option is enabled.
Intel Turbo Boost Technology
Enable Intel Turbo Boost Technology Enables or disables 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.
NOTE: To view this option, enable Advanced Setup mode as described in View
Advanced Setup options.
158 BIOS Setup
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