87ACPI ConfigurationUse this feature to confi gure Advanced Confi guration and PowerInterface (ACPI) power management settings for your system.Parameter Description OptionsACPI Aware O/S Select Yes to enable ACPI support for anoperating system that supports ACPI.Select No to disable ACPI support for anOS that does not support ACPI.YesNoACPI VersionFeatures (Availablewhen ACPI AwareOS is set to Yes)This feature is used to select the ACPI Version. Theoptions are ACPI v1.0, ACPI v2.0, and ACPI v3.0. Referto the website at http://www.acpi.info/ for details.ACPI APIC Support(Available whenACPI Aware OS isset to Yes)Select Enabled to include the ACPI APICTable Pointer in the RSDT (Root SystemDescription Table) pointer list.EnabledDisabledAPIC ACPI SCI IRQ When this item is set to Enabled, APICACPI SCI IRQ is supported by the system.EnabledDisabledHeadless Mode(Available whenACPI Aware OS isset to Yes)When this feature is set to Enabled, asystem will function without a keyboard,monitor, or mouse attached.EnabledDisabledNUMA Support Select Enabled to use the feature ofNon-Uniform Memory Access to improveCPU performance.EnabledDisabledHigh-PerformanceEvent TimerSelect Enabled to activate the High-Performance Event Timer (HPET) whichwill produce periodic interrupts at amuch higher frequency than a Real-timeClock (RTC) does in synchronizingmultimedia streams, providing smoothplayback and reducing the dependencyon other timestamp calculation devices,such as an x86 RDTSC Instructionembedded in the CPU. The HighPerformance Event Timer is used toreplace the 8254 Programmable IntervalTimer.EnabledDisabled
