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5
Computer Power Management: More Challenging, More Savings
•System Standby (S3)
oDrops power to 1-3 W
oWakes up in seconds
oSaves $10-40 per PC annually
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•Hibernate (S4)
oDrops power to 1-3 W
oWakes up in 20+ seconds
oSaves work if power is lost
oSaves $10-40 per PC annually
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CPM drops both the computer AND the monitor into a low powered sleep mode.
In Windows machines, you can go with either System Standby or Hibernate…
Bottom line: combined svgs of $75 or $100

NEXT SLIDE: So what do we recommend?

DETAILS:
S3 is known as Suspend to RAM (STR) in the BIOS, Standby in versions of Windows through Windows XP and in some varieties of Linux, Sleep in Windows Vista and Mac OS X, although the ACPI specification mentions only the terms S3 and Sleep.
S4: Hibernation in Windows, Safe Sleep in Mac OS X, also known as Suspend to disk, although the ACPI specification mentions only the term S4 (main article: Hibernate (OS feature)). In this state, all content of main memory is saved to non-volatile memory such as a hard drive, preserving the state of the operating system, all applications, open documents etc. That means that after coming back from S4, the user can resume work where it was left off in much the same way as with S3.