Intel S845WD1-E Product Guide - Page 30

Power Connector, Fan Connectors - motherboard

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CAUTION Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and Instantly Available PC technology features are used. 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. ✏ 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. Power Connector When used with an ATX12V or EPS-12 V compliant power supply that supports remote power on/off, the S845WD1H server board can turn off the system power through software control. When the system BIOS receives the correct 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. ✏ NOTE A standard ATX 20 pin power connector and standard ATX 12V 4 pin 2x2 connector can be used to power the S845WD1H board. Plug the power cables into the pin 1 end of their respective motherboard connectors, leaving pins 21-24 unused on the main power connector and 5-8 unused on the 12V connector. Fan Connectors Table 8 summarizes the function/operation of the fan connectors. Table 8. Fan Connector Function/Operation Connector Description Processor fan (CPU FAN) • +12 V DC connection for a processor fan or active fan heat sink. • 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 Management ASIC. Front and rear chassis fans (FAN1, FAN2, and FAN3) • +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 Management ASIC. 30 Intel Server Board S845WD1-E (S845WD1H) Product Guide

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30
Intel Server Board S845WD1-E (S845WD1H) Product Guide
CAUTION
Ensure that the power supply provides adequate +5 V standby current if
LAN wake capabilities and Instantly Available PC technology features are
used.
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.
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.
Power Connector
When used with an ATX12V or EPS-12 V compliant power supply that supports remote power
on/off, the S845WD1H server board can turn off the system power through software control.
When the system BIOS receives the correct 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.
NOTE
A standard ATX 20 pin power connector and standard ATX 12V 4 pin 2x2
connector can be used to power the S845WD1H board.
Plug the power
cables into the pin 1 end of their respective motherboard connectors, leaving
pins 21-24 unused on the main power connector and 5-8 unused on the 12V
connector.
Fan Connectors
Table 8 summarizes the function/operation of the fan connectors.
Table 8.
Fan Connector Function/Operation
Connector
Description
Processor fan (CPU
FAN)
•
+12 V DC connection for a processor fan or active fan heat sink.
•
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 Management ASIC.
Front and rear
chassis fans (FAN1,
FAN2, and FAN3)
•
+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 Management ASIC.