Intel D848PMB Product Guide - Page 20

Power Management Features, ACPI, Power Connectors, Fan Connectors

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Intel Desktop Board D848PMB Product Guide Power Management Features Power management is implemented at several levels, including: • Advanced Configuration and Power Interface (ACPI) • Hardware support:  Power connectors  Fan connectors  Fan Speed Control  Suspend to RAM (Instantly Available PC technology)  Resume on Ring  Wake from USB  Wake from PS/2 keyboard/mouse  PME# wakeup support ACPI ACPI gives the operating system direct control over the power management and Plug & Play functions of a computer. The use of ACPI with the desktop board requires an operating system that provides full ACPI support. Power Connectors The desktop board has two power connectors. See Figure 13 on page 39 for the location of the power connectors. Fan Connectors The desktop board has two chassis fan connectors (Intel Precision Cooling Technology) and one processor fan connector. See Figure 13 on page 39 for the location of the fan connectors. Fan Speed Control (Intel® Precision Cooling Technology) Intel Precision Cooling Technology automatically adjusts the chassis fan speeds depending on the system's temperature. This feature reduces system fan noise by lowering the speed of the chassis fans connected to the front and rear chassis fan connectors. The processor fan connector is not controlled. The fan speed control feature can be disabled in the BIOS, resulting in the chassis fans always operating at full speed. This feature should be disabled if a self-controlled fan is attached to a chassis fan connector. Overall system noise reduction will vary based on system configuration and environment. 20

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Intel Desktop Board D848PMB Product Guide
Power Management Features
Power management is implemented at several levels, including:
•
Advanced Configuration and Power Interface (ACPI)
•
Hardware support:
Power connectors
Fan connectors
Fan Speed Control
Suspend to RAM (Instantly Available PC technology)
Resume on Ring
Wake from USB
Wake from PS/2 keyboard/mouse
PME# wakeup support
ACPI
ACPI gives the operating system direct control over the power management and Plug & Play
functions of a computer.
The use of ACPI with the desktop board requires an operating system that
provides full ACPI support.
Power Connectors
The desktop board has two power connectors.
See Figure 13 on page 39 for the location of the
power connectors.
Fan Connectors
The desktop board has two chassis fan connectors (Intel Precision Cooling Technology) and one
processor fan connector.
See Figure 13 on page 39 for the location of the fan connectors.
Fan Speed Control (Intel
®
Precision Cooling Technology)
Intel Precision Cooling Technology automatically adjusts the chassis fan speeds depending on the
system’s temperature.
This feature reduces system fan noise by lowering the speed of the chassis
fans connected to the front and rear chassis fan connectors.
The processor fan connector is not
controlled.
The fan speed control feature can be disabled in the BIOS, resulting in the chassis fans always
operating at full speed.
This feature should be disabled if a self-controlled fan is attached to a
chassis fan connector.
Overall system noise reduction will vary based on system configuration and environment.
20