Intel D915GMH Product Specification - Page 43

Power Connector, 13.2.2, Fan Connectors

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Product Description ✏ 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. 1.13.2.1 Power Connector BTX-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 Refer to Figure 20, page 64 Table 27, page 67 1.13.2.2 Fan Connectors The function/operation of the fan connectors is as follows: • The fans are on when the board is in the S0 or S1 state. • The fans are off when the board is off or in the S3, S4, or S5 state. • Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan control ASIC. • All fan connectors support closed-loop fan control that can adjust the fan speed or switch the fan on or off as needed. • All fan connectors have a +12 V DC connection. For information about The location of the fan connectors The location of the fan connectors and sensors for thermal monitoring The signal names of the processor fan connector The signal names of the chassis fan connectors Refer to Figure 20, page 64 Figure 15, page 39 Table 24, page 66 Table 23, page 66 43

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Product Description
43
✏
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.
1.13.2.1
Power Connector
BTX-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
Refer to
The location of the main power connector
Figure 20, page 64
The signal names of the main power connector
Table 27, page 67
1.13.2.2
Fan Connectors
The function/operation of the fan connectors is as follows:
•
The fans are on when the board is in the S0 or S1 state.
•
The fans are off when the board is off or in the S3, S4, or S5 state.
•
Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan
control ASIC.
•
All fan connectors support closed-loop fan control that can adjust the fan speed or switch the
fan on or off as needed.
•
All fan connectors have a +12 V DC connection.
For information about
Refer to
The location of the fan connectors
Figure 20, page 64
The location of the fan connectors and sensors for thermal monitoring
Figure 15, page 39
The signal names of the processor fan connector
Table 24, page 66
The signal names of the chassis fan connectors
Table 23, page 66