May 2008

Advanced Configuration Power Interface (ACPI), University of Oxford, UK

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The University of Oxford is trying to devise a comprehensive power-management mechanism that will not only save substantial amounts of electrical energy but will also reduce carbon emissions

Managing power and socialising controls

ACPI The Advanced Configuration Power Interface (ACPI), introduced in 1996, is the industrial specification for computer power management. It consists of six power states, S0 to S5; the main aspects of these power states are summarised in the table below.

ACPI

Description

Wake-up time

Typical PC power demand

50 working state or'on-idle' none high (80 to 120W)
51 soft standby

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