Intel G13841-001, DH67GD Software Support, Hardware Support, Acpi, Power Connectors, Fan Headers

Desktop Board Features

Software Support

ACPI

ACPI gives the operating system direct control over the power management and Plug and Play functions of a computer. The use of ACPI with the Desktop Board requires an operating system that provides full ACPI support.

Hardware Support

Power Connectors

ATX12V-compliant power supplies can turn off the computer power through system control. When an ACPI-enabled computer receives the correct command, the power supply removes all non-standby voltages.

When resuming from an AC power failure, the computer returns to the power state it was in before power was interrupted (either on or off). The computer’s response can be set by using the Last Power State feature in the BIOS Setup program’s Boot menu.

The Desktop Board has two power connectors. See Figure 23 on page 51 for the location of the power connectors.

Fan Headers

The function/operation of the fans is as follows:

•The fans are on when the board is in the ACPI S0 state.

•The fans are off when the computer is in the ACPI S3, S4, or S5 state.

•Each fan header is wired to a tachometer input.

•All fan headers support closed-loop fan control that can adjust the fan speed or switch the fan on or off as needed.

•All fan headers have a +12 V DC connection (up to 12 V DC when using 3-wire chassis fans).

•All fan headers are controlled by Pulse Width Modulation.

•The chassis fan header supports linear fan control on 3-wire fans.

The Desktop Board has a 4-pin processor fan header and two 4-pin chassis fan headers compatible with 4-wire and 3-wire chassis fans.

LAN Wake Capabilities

CAUTION

For LAN wake capabilities, 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.

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.

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