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Difference between ACPI and APM

Difference between ACPI and APM

There are two main power management schemes in use today: ACPI and APM. They both have their pros and cons, but what are the differences between them? This article will explore the key features of each system and help you decide which is right for your needs.

What is ACPI?

ACPI (Advanced Configuration and Power Interface) is a specification that defines a standardized interface for operating systems to configure, control, and monitor the power consumption of devices in ACPI-compliant machines. ACPI enables devices to be powered down when not in use, and provides a mechanism for the operating system to put the machine into different low-power states—such as standby, suspend, or hibernate—when it is not being used. ACPI also defines interfaces for hardware manufacturers to develop drivers that can take advantage of these power management features. ACPI is supported by most major operating systems, including Microsoft Windows, Apple macOS, Linux, and FreeBSD.

What is APM?

APM is an energy management system that provides a range of benefits for businesses. APM systems help to optimize power use and improve efficiency, while also reducing costs. In addition, APM systems can help to improve the reliability of power supplies and reduce the impact of power outages. APM systems are used in a variety of industries, including healthcare, manufacturing, and retail. APM systems are typically designed for specific business needs and can be customized to fit the unique requirements of each organization. APM systems are an important tool for businesses that are looking to improve their energy management practices.

Difference between ACPI and APM

ACPI (Advanced Configuration and Power Interface) and APM (Advanced Power Management) are two power management specifications that are commonly used in laptops and other portable devices. ACPI is the more recent of the two specifications, and it offers a number of advantages over APM. For example, ACPI provides Greater power savings potential
• Morefine-grained control over devices.
• The ability to power down individual devices rather than shutting off power to the entire system.
• Support for “wake-on” features such as wake-on-LAN and wake-on-ring.
ACPI is the specification most often used in new laptops and other portable devices. However, many older devices still use APM.


ACPI and APM are two different types of power management. ACPI is the newer, more advanced standard, while APM is older and less capable. If you have a choice between using ACPI or APM on your computer, we recommend using ACPI.

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