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S States (ACPI #1)
Power saving states used by computers today to reduce power usage during non-use.
4
Computer Science
Not Applicable
07/20/2010

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Cards

Term
S1
Definition
Hard Drive and Monitor are turned off. Everything else runs normally. Some call it sleep mode or standby mode
Term
S2
Definition
Hard Drive, Monitor, and Processor (CPU) are turned off. Some call it sleep mode or standby mode.
Term
S3
Definition
Everything Shut down except RAM and enough of the motherboard to respond to a wake-up call (such as pressing a key on the keyboard or moving the mouse. Some call this sleep mode, suspend mode, standby mode or suspend to RAM.
Term
S4
Definition
Everything in RAM is copied to the hard drive and then the system shuts down. Called Hibernation. Later, when power button is pressed, system can quickly restart by reading the hibernation file to the state it was in exactly before the system shut down.
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