Datasheet

Intel Desktop Board D875PBZ Technical Product Specification
44
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 Refer to
The power connector locations Figure 18, page 63
The power connector signal names Table 28, page 65 and Table 25, page 64
The BIOS Setup program’s Boot menu Table 69, page 118
The ATX specification Section 1.4, page 17
1.12.2.2 Fan Connectors
CAUTION
The processor fan must be connected to the processor fan connector, not to a chassis fan
connector. Connecting the processor fan to a chassis fan connector may result in onboard
component damage that will halt fan operation.
Table 11 summarizes the fan connector function/operation.
Table 11. Fan Connector Function/Operation
Connector Description
Processor fan • +12 V DC connection for a processor fan or active fan heatsink.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fan on or off as
needed.
Front and rear
chassis fans
• +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fan on or off as
needed.
Voltage regulator
fan
• +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
For information about: Refer to:
The location of the fan connectors Figure 18, page 63
The signal names of the fan connectors Pages 64 and 65
The location of the fan connectors and sensors for thermal monitoring Figure 13, page 39