Intel Desktop Board D850GB/D850GBAL Product Guide
18
Power Management Features
Power management is implemented at several levels, including:
• Software support:
Advanced Configuration and Power Interface (ACPI)
Advanced Power Management (APM)
• Hardware support:
Power connector
Fan connectors
Wake on LAN technology
Instantly Available technology
Resume on Ring
Wake from USB
Wake from PS/2 keyboard
PME# wakeup support
If the board is used with an ACPI-aware operating system, the BIOS can provide ACPI support.
Otherwise, it defaults to APM support.
Wake on LAN Technology
CAUTION
For Wake on LAN technology, the 5-V standby line for the power supply must be capable of
delivering +5 V
±
5 % at 720 mA. Failure to provide adequate standby current when using this
feature can damage the power supply.
The Wake on LAN technology connector can be used with PCI bus network adapters that have a
remote wake-up connector. Network adapters that are PCI 2.2 compliant assert the wake-up signal
using the PCI bus signal PME# (pin A19 on the PCI bus connectors). See Figure 1 on page 9 for
the location of the Wake on LAN technology connector on the board.
Instantly Available Technology
CAUTION
For Wake on LAN technology, the 5-V standby line for the power supply must be capable of
delivering +5 V
±
5 % at 720 mA. Failure to provide adequate standby current when using this
feature can damage the power supply.
Instantly Available 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 board’s standby power indicator, shown in Figure 2 on page 19, is lit when the memory
modules and PCI bus connectors have power, even when the computer appears to be off.
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