ACPI 2.0 Support – The Tech ARP BIOS Guide

ACPI 2.0 Support - The Tech ARP BIOS Guide

ACPI 2.0 Support

Common Options : Enabled, Disabled

 

Quick Review of ACPI 2.0 Support

While its name hints that this BIOS feature is a toggle to enable ACPI 2.0 features, this is not the case. Enabling this BIOS feature does not turn on ACPI 2.0. Similarly, disabling it does not turn on the original ACPI 1.0 standard. It disables ACPI completely.

The ACPI 2.0 Support BIOS feature merely determines if ACPI support is enabled on the motherboard chipset level. The name ACPI 2.0 Support merely means that this motherboard supports the ACPI 2.0 standard.

If enabled, ACPI support will be enabled on the motherboard chipset level. If the operating system supports ACPI, it can then use ACPI to configure the hardware, as well as control the system’s power management features.

If disabled, ACPI support will be disabled on the motherboard chipset level. Even if the operating system supports ACPI, it cannot use ACPI to configure the hardware or control its power management features.

It is recommended that you enable this BIOS feature. This allows an ACPI-compliant operating system to fully control the configuration of hardware devices and their power management.

Please note that for Microsoft Windows to run in ACPI mode, it needs to be installed with ACPI enabled in the BIOS. If you switch from ACPI to non-ACPI mode, or vice versa, Microsoft Windows will fail to boot. You need to reinstall Microsoft Windows everytime you switch modes.

 

Details of ACPI 2.0 Support

The Advanced Configuration and Power Interface (ACPI) is an open industry standard jointly developed by Intel, Microsoft, HP, Phoenix and Toshiba. It establishes standards for hardware and software interfaces that allow the operating system to configure hardware devices, as well as manage their power.

First published in 1999, it has since undergone numerous updates. Released in August 2000, Revision 2.0 of the ACPI specifications was the first major specification revision. It boasts of the following changes :

  • 64-bit addressing support added
  • Processor and device performance state support added
  • Numerous multiprocessor workstation and server-related enhancements
  • Consistency and readability enhancements throughout (the document)

For ACPI to work properly, both the motherboard and operating system must support ACPI. This means using Microsoft Windows 98 or newer, if you are on the Microsoft Windows platform. Even so, ACPI may not be enabled if ACPI support is not enabled on the motherboard.

While its name hints that this BIOS feature is a toggle to enable ACPI 2.0 features, this is not the case. Enabling this BIOS feature does not turn on ACPI 2.0. Similarly, disabling it does not turn on the original ACPI 1.0 standard. It disables ACPI completely.

The ACPI 2.0 Support BIOS feature merely determines if ACPI support is enabled on the motherboard chipset level. The name ACPI 2.0 Support merely means that this motherboard supports the ACPI 2.0 standard.

If enabled, ACPI support will be enabled on the motherboard chipset level. If the operating system supports ACPI, it can then use ACPI to configure the hardware, as well as control the system’s power management features.

If disabled, ACPI support will be disabled on the motherboard chipset level. Even if the operating system supports ACPI, it cannot use ACPI to configure the hardware or control its power management features.

It is recommended that you enable this BIOS feature. This allows an ACPI-compliant operating system to fully control the configuration of hardware devices and their power management.

Please note that for Microsoft Windows to run in ACPI mode, it needs to be installed with ACPI enabled in the BIOS. If you switch from ACPI to non-ACPI mode, or vice versa, Microsoft Windows will fail to boot. You need to reinstall Microsoft Windows everytime you switch modes.

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