In technical terms ACPI or Advanced Configuration and Power Interface provides guidelines for configuring a peripheral device. The S2 standard describes that CPIU (or Central Processing Unit) is powered off.
S1 is the power state to "suspend" the CPU. Power is still used in this state and it can be thought of as a light sleep. Higher numbers represent deeper sleeps such as S4 "hibernation", in which context is saved to disk and no power is used.
Hibernation
An ACPI processor helps the computer recognized motherboard, hardware and drivers. It just replaces the old AMP standard.
Advanced Configuration and Power Interface (ACPI)
ACPI was initally developed by Intel, Microsoft, and Toshiba. Current developers of ACPI include Phoenix, Dell, and Hewlett-Packard.
ACPI or Advanced Configuration and Power Interface, is a specification that defines recognition for hardware, motherboards and other devices. It replaces the older AMP standard. x86 is just referring to the processor. Its all based of x86 technology back from the IBM 8086 Cpu's. that's why for a while CPU's kept getting designated 286, 386, 486 etc. cause it was all based of the x86 technology
Green Star is a corporation. ACPI is a standard.
APM (Advanced Power Management).
Hibernation
ACPI stands for Advanced Configuration and Power Interface. ACPI provides a standard for configuring devices and managing power for the operating system.
An ACPI processor helps the computer recognized motherboard, hardware and drivers. It just replaces the old AMP standard.
ACPI
Advanced Configuration and Power Interface (ACPI)
In S1 (sleep mode) only the hard drive and monitor are shut off, everything else runs normally.Page 112 in A+ Hardware Managing, Maintaining, and Troubleshooting.
ACPI is a function of the hardware and the BIOS. Most Pentium II motherboards do have ACPI, but you cannot add ACPI to a system that does not. If you cannot get ACPI to work, check to see if it is enabled in the BIOS.
ACPI S3 mode
ACPI is the successor APMOperating System
With ACPI the operating system controls power management.