Intel D845GLAD Product Guide - Page 16

Power Management Features, ACPI, Suspend to RAM (Instantly Available PC Technology)

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Intel Desktop Boards D845GLLY and D845GLAD Product Guide Power Management Features • Advanced Configuration and Power Interface (ACPI) • Suspend to RAM (Instantly Available PC technology) ACPI ACPI gives the operating system direct control over the power management and Plug & Play functions of a computer. The use of ACPI with Desktop Board D845GLLY or D845GLAD requires an operating system that provides full ACPI support. Suspend to RAM (Instantly Available PC Technology) CAUTION For Instantly Available PC technology, the 5 V standby line for the power supply must be capable of delivering adequate +5 V standby current. Failure to provide adequate standby current when using this feature can damage the power supply and/or effect ACPI S3 sleep state functionality. Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM) sleep state. While in the S3 sleep state, the computer will appear to be off. When signaled by a wake-up device or event, the system quickly returns to its last known awake state. The Intel desktop board's standby power indicator, shown in Figure 2, is lit when there is standby power to the system. This includes the memory modules and PCI bus connectors, even when the computer appears to be off. If the system has a dual-colored power LED on the front panel, the sleep state is indicated by the LED turning amber. OM13679 Figure 2. Location of the Standby Power Indicator 16

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Intel Desktop Boards D845GLLY and D845GLAD Product Guide
16
Power Management Features
•
Advanced Configuration and Power Interface (ACPI)
•
Suspend to RAM (Instantly Available PC technology)
ACPI
ACPI gives the operating system direct control over the power management and Plug & Play
functions of a computer.
The use of ACPI with Desktop Board D845GLLY or D845GLAD
requires an operating system that provides full ACPI support.
Suspend to RAM (Instantly Available PC Technology)
CAUTION
For Instantly Available PC technology, the 5 V standby line for the power supply must be capable
of delivering adequate +5 V standby current.
Failure to provide adequate standby current when
using this feature can damage the power supply and/or effect ACPI S3 sleep state functionality.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM)
sleep state.
While in the S3 sleep state, the computer will appear to be off.
When signaled by a
wake-up device or event, the system quickly returns to its last known awake state.
The Intel desktop board
’
s standby power indicator, shown in Figure 2, is lit when there is standby
power to the system.
This includes the memory modules and PCI bus connectors, even when the
computer appears to be off.
If the system has a dual-colored power LED on the front panel, the sleep state is indicated by the
LED turning amber.
OM13679
Figure 2.
Location of the Standby Power Indicator