Which ACPI power state provides power to the CPU and RAM, but powers down unused devices?
- S3
- S4
- S1
- S0
- S2
Explanation: The Advanced Configuration and Power Interface (ACPI) standard provides support for power states that are very important to mobile devices such as laptops.
- S0 – The computer is on and CPU running.
- S1 – CPU and RAM have power, but unused devices are powered down.
- S2 – CPU is off; RAM is refreshed.
- S3 – CPU is off; RAM is set to a slow refresh rate.
- S4 – CPU and RAM are off (and RAM contents saved to a temp file).
- S5 – The computer is off.
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