Intel WX58BP Product Guide - Page 21

Instantly Available PC Technology, 5 V Standby Power Indicator

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Board Features LAN wakeup capabilities enable remote wake-up of the computer through a network. The LAN subsystem monitors network traffic and upon detecting a Magic Packet* frame, it asserts a wake-up signal that powers up the computer. Instantly Available PC Technology CAUTIONS 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 affect ACPI S3 sleep state functionality. Power supplies used with this Board must be able to provide enough standby current to support the standard Instantly Available (ACPI S3 sleep state) configuration. If the standby current necessary to support multiple wake events from the PCI and/or USB buses exceeds the power supply's capacity, the Board may lose register settings stored in memory. Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-toRAM) sleep state. While in the S3 sleep state, the computer appears to be turned-off. If the computer has a dual-colored power LED on the front panel, the sleep state is indicated by the LED turning amber. When signaled by a wake-up device or event, the computer quickly returns to its last known awake state. The Workstation Board supports the PCI Bus Power Management Interface Specification. Add-in cards that support this specification can participate in power management and can be used to wake the computer. +5 V Standby Power Indicator CAUTION If the AC power was switched off and the standby power indicator is still lit, disconnect the power cord before installing or removing any devices connected to the board. Failure to do so could damage the board and any attached devices. The Workstation Board's standby power indicator, shown in Figure 3, is lit when there is standby power still present on the board even when the computer appears to be off. For example, when this LED is lit, standby power is still present at the memory module sockets and the PCI bus connectors. 21

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Board Features
21
LAN wakeup capabilities enable remote wake-up of the computer through a network.
The LAN subsystem monitors network traffic and upon detecting a Magic Packet*
frame, it asserts a wake-up signal that powers up the computer.
Instantly Available PC Technology
CAUTIONS
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 affect
ACPI S3 sleep state functionality.
Power supplies used with this Board must be able to provide enough standby current
to support the standard Instantly Available (ACPI S3 sleep state) configuration.
If the
standby current necessary to support multiple wake events from the PCI and/or USB
buses exceeds the power supply’s capacity, the Board may lose register settings
stored in memory.
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 appears to be turned-off.
If the computer has a dual-colored power LED on the front panel, the sleep state is
indicated by the LED turning amber. When signaled by a wake-up device or event, the
computer quickly returns to its last known awake state.
The Workstation Board supports the
PCI Bus Power Management Interface
Specification
. Add-in cards that support this specification can participate in power
management and can be used to wake the computer.
+5 V Standby Power Indicator
CAUTION
If the AC power was switched off and the standby power indicator is still lit, disconnect
the power cord before installing or removing any devices connected to the board.
Failure to do so could damage the board and any attached devices.
The Workstation Board’s standby power indicator, shown in Figure 3, is lit when there
is standby power still present on the board even when the computer appears to be off.
For example, when this LED is lit, standby power is still present at the memory module
sockets and the PCI bus connectors.