36 Pre-operating system managementapplications4 Onthe SystemBIOS screen, click Processor Settings.Related linksProcessor SettingsProcessor Settings detailsProcessor Settings detailsThe Processor Settings screen details are explained as follows:Option DescriptionLogicalProcessor Enablesordisablesthelogicalprocessorsanddisplaysthenumberoflogicalprocessors.IfthisoptionissettoEnabled,theBIOSdisplaysallthelogicalprocessors.IfthisoptionissettoDisabled,theBIOSdisplaysonlyonelogical processor per core. This option is set to Enabledbydefault.QPI Speed Enables youtocontrolQuickPathInterconnectdataratesettings.Alternate RTID(RequestorTransaction ID)SettingVirtualizationTechnologyAddress TranslationService (ATS)Adjacent CacheLine PrefetchHardwarePrefetcherDCU StreamerPrefetcherModifies Requestor Transaction IDs, which are QPI resources. This option is set to Disabled by default.NOTE:Enablingthisoptionmaynegativelyimpacttheoverallsystemperformance.Enables or disables the additional hardware capabilities provided for virtualization. This option is set to Enabled bydefault.Defines the Address Translation Cache (ATC) for devices to cache the DMA transactions. This option provides aninterface between CPU and DMA Memory Management toa chipset's Address Translation and Protection Tableto translate DMA addresses to host addresses. This option is setto Enabledbydefault.Optimizesthesystemforapplications that need high utilization of sequential memoryaccess. This option is settoEnabled by default. You can disable this option for applications that need high utilization of random memoryaccess.Enables or disables the hardware prefetcher. This option is set to Enabled by default.Enables or disables the Data Cache Unit (DCU) streamer prefetcher. This option is set to Enabled by default.DCU IP Prefetcher Enables or disables the Data Cache Unit (DCU) IP prefetcher. This option is setto Enabledby default.ExecuteDisable Enables you to run the disable memoryprotection technology. This option is set to Enabledbydefault.LogicalProcessorIdlingEnablesyoutoimprovetheenergyefficiencyofasystem. Ituses the operating system core parking algorithm andparks some of the logical processors in the system which in turn allows the corresponding processor cores totransition into a lower power idle state. This option can only be enabled if the operating system supports it. It is setto Disabled by default.Configurable TDP Enables you to reconfigure the processor Thermal Design Power (TDP) levels during POST based on the powerand thermal delivery capabilities of the system. TDP verifies the maximum heat the cooling system is needed todissipate. Thisoptionissetto Nominalbydefault.NOTE: This option is only available on certain stock keeping units (SKUs) of the processors.X2Apic Mode Enables or disables the X2Apic mode.Dell ControlledTurboNumberof Coresper ProcessorProcessor 64-bitSupportControls the turbo engagement. Enable this option only when System Profile is set to Performance.NOTE: Dependingon the number of installed CPUs, there may be up to four processor listings.Controls the number of enabled cores ineach processor. This optionissetto Allbydefault.Specifiesiftheprocessor(s)support64-bitextensions.