User`s guide

68 007-5653-001
6: BIOS
ACPI Configuration
Use this feature to configure Advanced Configuration and Power Interface (ACPI) power
management settings for your system.
ACPI Version Features
The options are ACPI v1.0, ACPI v2.0, and ACPI v3.0. Please refer to ACPI's website for further
explanation: http://www.acpi.info/.
ACPI APIC Support
Select Enabled to include the ACPI APIC Table Pointer in the RSDT (Root System Description
Table) pointer list. The options are Enabled and Disabled.
APIC ACPI SCI IRQ
When this item is set to Enabled, APIC ACPI SCI IRQ is supported by the system. The options
are Enabled and Disabled.
Headless Mode
This feature is used to enable system to function without a keyboard, monitor or mouse attached
The options are Enabled and Disabled.
NUMA Support
Select Enabled to use the feature Non-Uniform Memory Access to improve CPU performance.
The options are Enabled and Disabled.
High Performance Event Timer
Select Enabled to activate the High Performance Event Timer (HPET) that produces periodic
interrupts at a much higher frequency than a Real-time Clock (RTC) does in synchronizing
multimedia streams, providing smooth playback and reducing the dependency on other timestamp
calculation devices, such as an x86 RDTSC Instruction embedded in the CPU. The High
Performance Event Timer is used to replace the 8254 Programmable Interval Timer. The options
are Enabled and Disabled.