Processors

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.

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.

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.

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.

When "No Priority" is selected, there is no preferred IO bus. When a specific bus is selected for higher IO priority, the format of the field is XX, where XX is the bus number in hex.

Numeric input

Preferred IO Bus Number 0x0-0xFF: Bus Number.

When enabled, each CCX in the system will be declared as a separate NUMA domain. When disabled, memory addressing/NUMA nodes per socket will be declared.

Selectable option.

Enables/disable L1 stream HW prefetcher. Fetches the next cache line into the L1 cache when cached lines are reused within a certain time period or accessed sequentially.

Selectable option.

Enables/disable L2 stream HW prefetcher. Fetches the next cache line into the L2 cache when cached lines are reused within a certain time period or accessed sequentially.

Selectable option.

Can be used to disable symmetric multithreading. To re-enable SMT, a power cycle is needed after selecting Enable.

Selectable option.

CPPC(cooperative processor performance control) is a way for the OS to influence the performance of a CPU on a contiguous and abstract scale without knowledge of power budgets or discrete processor frequencies.

Selectable option.

Maximum boost frequency. Auto set the boost frequency to the fused value for the installed CPU. When a manual value is entered, the value entered is a 4 digit number representing the maximum boost frequency in MHZ. The value entered applies to all cores.

Numeric input

Maximum boost frequency. Auto set the boost frequency to the fused value for the installed CPU. When a manual value is entered, the value entered is a 4 digit number representing the maximum boost frequency in MHZ. The value entered applies to all cores.

Enable/disable CPU Virtualization.

Sets the xGMI width. Auto sets maximum width based on the system capabilities.

APIC Mode. xAPIC scales to only 255 hardware threads. x2APIC scales beyond 255 hardware threads but is not supported by some legacy OS versions. Auto uses x2APIC only if 256 hardware threads are in the system. Otherwise xAPIC is used.

DLWM saves power during periods of low socket-to-socket data traffic by reducing the number active xGMI lanes per link from 16,8,2. Disabling this parameter can achieve a fixed xGMI link width.