Power - Foxconn H77M Series User Manual

Power

Main F-Center Advanced Boot Power Health Security Save & Exit
ACPI Sleep State
Resume By PS2 KB/Mouse
Resume By USB Device(s)
Resume By PCIE Device(s)
Resume By PCI PME
Resume By Modem Ring
Resume By Onboard LAN
Resume By RTC
Energy-using Products
Restore AC Power Loss
ACPI (Advanced Configuration and Power Interface) is an open industry standard interfaces
enabling OS-directed configuration, power management, and thermal management of mobile,
desktop, and server platforms. It defines five sleeping states, they are :
S1 - The S1 sleeping state is a low wake latency sleeping state. In this state, no system
context is lost (CPU or chip set) and hardware maintains all system context. (also called
Power On Suspend)
S2 - The S2 sleeping state is a low wake latency sleeping state. This state is similar to the S1
sleeping state except that the CPU and system cache context is lost (the OS is respon-
sible for maintaining the caches and CPU context). Control starts from the processor's
reset vector after the wake event.
S3 - The S3 sleeping state is a low wake latency sleeping state where all system context is lost
except system memory. CPU, cache, and chip set context are lost in this state. Hardware
maintains memory context and restores some CPU and L2 configuration context. Control
starts from the processor's reset vector after the wake event. (also called Suspend to
RAM)
S4 - The S4 sleeping state is the lowest power, longest wake latency sleeping state supported
by ACPI. In order to reduce power to a minimum, it is assumed that the hardware platform
has powered off all devices. Platform context is maintained. (also called Suspend to Disk)
S5 - The S5 state is similar to the S4 state except that the OS does not save any context. The
system is in the "soft" off state and requires a complete boot when it wakes. Software
uses a different state value to distinguish between the S5 state and the S4 state to allow
for initial boot operations within the BIOS to distinguish whether or not the boot is going to
wake from a saved memory image.
► ACPI Sleep State
This item is used to set the energy saving mode of the ACPI function. When you select "S1
(POS)" mode, the power is always on and computer can be resumed at any time. When
Aptio Setup Utility - C opyright (C) 2011 American Megatrends, Inc.
Power
[S3]
[Enabled]
[Enabled]
[Disabled]
[Disable]
[Disabled]
[Disabled]
[Disabled]
[Enabled]
[Power Off]
Version 2.14.1219. Copyright (C) 2011 American Megatrends, Inc.
Select the highest ACPI sleep
state the system will enter
when the SUSPEND button is
pressed.
→ ← : Select Screen
↑ ↓ : Select Item
Enter: Select
+/-: Change Opt.
F1: General Help
F2: Previous Values
F3: Optimized Defaults
F4: Save & Exit
ESC: Exit
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