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Product Description

1.12.2 Hardware Support

CAUTION

If the Wake on LAN and Instantly Available technology features are used, ensure that the power

supply provides adequate +5 V standby current. Failure to do so can damage the power supply.

The total amount of standby current required depends on the wake devices supported and

manufacturing options. Refer to Section 2.11.3 on page 74 for additional information.

The D850GB board provides several power management hardware features, including:

• 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

Wake on LAN technology and Instantly Available technology require power from the +5 V

standby line. The sections discussing these features describe the incremental standby power

requirements for each.

Resume on Ring enables telephony devices to access the computer when it is in a power-managed

state. The method used depends on the type of telephony device (external or internal) and the

power management mode being used (APM or ACPI).

✏

NOTE

The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an

operating system that provides full ACPI support.

1.12.2.1 Power Connector

When used with an ATX12V-compliant power supply that supports remote power on/off, the

D850GB board can turn off the system power through software control. To enable soft-off control

in software, advanced power management must be enabled in the BIOS Setup program and in the

operating system. When the system BIOS receives the correct APM command from the operating

system, the BIOS turns off power to the computer.

With soft-off enabled, if power to the computer is interrupted by a power outage or a disconnected

power cord, when power resumes, the computer returns to the power state it was in before power

was interrupted (on or off). The computer’s response can be set using the After Power Failure

feature in the BIOS Setup program’s Boot menu.

Intel D850GB User Manual

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