Operating modes

Selectable option.

Select the operating mode based on your preference.

Power savings and performance are also highly dependent on hardware and software running on the system.

Maximum Efficiency is the default setting.

Selectable option.

When set to Performance, performance is more predictable (deterministic) and operates at the lowest common denominator among the cores. But aggregate peak performance may be reduced. When set to Power, cores can scale frequency independently. Aggregate performance may be higher, but predictability is lower.

Performance is the default setting.

Selectable option.

When set to [Enable], cores can go to turbo frequencies.

Enable is the default setting.

Selectable option.

Auto is the default setting.

Numeric input

Sets the maximum power consumption for the CPU. Auto sets cTDP=TDP for the installed CPU SKU. Maximum sets the maximum allowed cTDP value for the installed CPU SKU. Usually, maximum is greater than TDP. If a manual value is entered that is larger than the max value allowed, the value will be internally limited to the maximum allowable value. cTDP is only configurable before OS boot.

Selectable option.

Sets the CPU package power limit. Compared to cTDP, PPL can also be changed at runtime and PPL supports a much lower effective limit than cTDP. If Auto is selected, it will be set to the maximum value allowed by the installed CPU. The maximum value allowed for PPL is the cTDP limit.

Auto is the default setting.

Numeric input

If a manual value is entered that is larger than the maximum value allowed, the value will be internally limited to the maximum allowable value. The maximum value allowed for PPL is the cTDP limit.

Selectable option.

The option number of memory speed is changed dynamically according to the combination of installed CPU SKU, DIMM type, number of DIMMs per channel, and system motherboard support. The system operate at the rated speed of the slowest DIMM in the system when populated with different speed DIMMs. Install DIMM which the rated speed below 2400 will result in the memory speed getting set to the minimum value.

Selectable option.

Enables/disables efficiency mode. When enabled, uses power efficiency optimized CCLK DPM settings.

Enable is the default setting.

Selectable option.

Sets the xGMI speed. N is the maximum speed and is auto-calculated from the system board capabilities. For system boards that do not support 4 discrete xGMI speed choices, some menu choices besides Minimumwill result in the xGMI speed getting set to the minimum value.

Minimum is the default setting.

Selectable option.

Global enables/disable for IO based C-state generation and DF C-states.

Enable is the default setting.

Selectable option.

[Maximum Performance] allows the most aggressive use of turbo and power management functions are disabled, thereby increasing power consumption. [Minimal Power] disables turbo and maximizes the use of power management features. When a preset mode is selected, the low-level settings are not changeable and will be grayed out. If user would like to change the settings, please choose [Custom Mode] in “Operating Mode” located under “System Setting” submenu.

Auto is the default setting.

Selectable option.

Enables/disable data fabric (DF) C-states. Data fabric C-states may be entered when all cores are in CC6.

Enable is the default setting.

Selectable option.

Enables/disables CPU P1 P-state.

Enable is the default setting.

Selectable option.

Enables/disables CPU P2 P-state.

Enable is the default setting.

Selectable option.

Enables/disables low-power features for DIMMs.