Desktop Board Features
21
Hardware Monitoring and Fan Speed Control
The features of the hardware monitoring and fan speed control include:
• Monitoring of power supply voltages to detect levels above and below acceptable
values
• Fan speed controllers and sensors integrated into the legacy I/O controller
• Thermal sensors in the processor, GMCH, and ICH7, plus an onboard remote
sensor
• Thermally monitored closed-loop fan control, for all onboard fans, that can adjust
fan speed or switch the fans off as needed
Chassis Intrusion
The board supports a chassis security feature that detects if the chassis cover has
been removed. The security feature uses a mechanical switch on the chassis that can
be connected to the chassis intrusion header on the Desktop Board. See Figure 21 for
the location of the c
hassis intrusion header.
Power Management Features
Power management is implemented at several levels, including:
• Software support through the Advanced Configuration and Power Interface (ACPI)
• Hardware support:
⎯ Power connectors
⎯ Fan headers
⎯ LAN wake capabilities
⎯ Instantly Available PC technology (Suspend to RAM)
⎯ +5 V standby power indicator LED
⎯ Wake from USB
⎯ Power Management Event signal (PME#) wakeup support
⎯ WAKE# signal wake-up support
• ENERGY STAR capable
ACPI
ACPI gives the operating system direct control over the power management and Plug
and Play functions of a computer. The use of ACPI with the Desktop Board requires an
operating system that provides full ACPI support.
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