The ACPI power state off describes when the CPU is powered down and the RAM is set to a slow refresh rate. This power state can be used to conserve energy in devices when not in use, as well as improve system performance when necessary.
What is ACPI Power State?
ACPI (Advanced Configuration and Power Interface) is a power management standard designed to reduce the amount of power consumed by computer systems. It provides an interface between computer hardware and software to allow the operating system to control the amount of power used by the system. ACPI power states refer to the different power states that a computer system can enter, such as when the computer is in sleep mode or when it is running at full capacity.
The CPU Off and RAM Slow Refresh Rate Power State
The ACPI power state that describes when the CPU is off and the RAM is set to a slow refresh rate is referred to as the S5 power state. This power state is also known as the “Soft-Off” state. It is the lowest power state available in ACPI and is used when the system is completely shut down.
In this state, the CPU is completely shut off, the RAM is put into a low-power refresh mode, and all other components are powered down. This state is used to save energy when the system is not in use and to ensure that the system is not drawing any unnecessary power.
Benefits of the S5 Power State
The S5 power state provides a number of benefits, including:
- Reduction in power consumption and energy costs.
- Reduction in the amount of heat generated by the system, resulting in improved system cooling.
- Increased system longevity by reducing the amount of wear and tear on components.
- Reduced system noise due to the lack of spinning fans or other components.
Conclusion
The S5 power state is an important power state in ACPI that describes when the CPU is off and the RAM is set to a slow refresh rate. This state helps to reduce power consumption and associated energy costs and provides other benefits such as improved system cooling, increased system longevity, and reduced system noise.
