Power Connector; Fan Headers; Lan Wake Capabilities - Intel DQ77MK User Manual

1.12.2.1

Power Connector

ATX12V-compliant power supplies can turn off the system power through system
control. When an ACPI-enabled system 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 (on or off). The computer's response can be set
using the Last Power State feature in the BIOS Setup program's Boot menu.
For information about
The location of the main power connector
The signal names of the main power connector
1.12.2.2

Fan Headers

The function/operation of the fan headers is as follows:
The fans are on when the board is in the S0 state
•
• The fans are off when the board is off or in the S3, S4, or S5 state
Each fan header is wired to a fan tachometer input of the hardware monitoring and
•
fan control ASIC
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
•
The fan headers are controlled by Pulse Width Modulation
•
For information about
The location of the fan headers
The location of the fan headers and sensors for thermal monitoring
1.12.2.3

LAN Wake Capabilities

CAUTION
For LAN wake capabilities, the +5 V standby line for the power supply must be capable
of providing adequate +5 V standby current. Failure to provide adequate standby
current when implementing LAN wake capabilities can damage the power supply.
LAN wake capabilities enable remote wake-up of the computer through a network.
The LAN subsystem PCI bus network adapter monitors network traffic at the Media
Independent Interface. Upon detecting a Magic Packet* frame, the LAN subsystem
asserts a wake-up signal that powers up the computer. Depending on the LAN
implementation, the board supports LAN wake capabilities with ACPI in the following
ways:
The PCI Express WAKE# signal
•
By Ping
•
Magic Packet
•
The onboard LAN subsystem
•
Product Description
Refer to
Figure 11, page 51
Table 29, page 59
Refer to
Figure 11, page 51
Figure 6, page 34
43