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The board has several hardware management features, including the following: • Fan monitoring and control • Thermal and voltage monitoring • Chassis intrusion detection 1.12.1 Hardware Monitoring and Fan Control The hardware monitoring and fan control subsystem is based on the Winbond W83677HG-I device, which supports the following: • Processor and system ambient temperature monitoring • Chassis fan speed monitoring • Power monitoring of +12 V, +5 V, +3.3 V, V_SM and +VCCP • SMBus interface 1.12.2 Fan Monitoring Fan monitoring can be implemented using Intel® Desktop Control Center or third-party software. For information about Refer to The functions of the fan headers Section 1.13.2.2, page 35 1.12.3 Chassis Intrusion and Detection The board supports a chassis security feature that detects if the chassis cover is removed. The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion header. When the chassis cover is removed, the mechanical switch is in the closed position. For information about Refer to The location of the chassis intrusion header Figure 11, page 45 Intel Desktop Board DP67BG Technical Product Specification 1.12.4 Thermal Monitoring Figure 6 shows the locations of the thermal sensors and fan headers. Item Description A Rear chassis fan header B Voltage regulator thermal diode C Thermal diode, located on processor die D Processor fan header E Front chassis fan header F Thermal diode, located on the Intel P67 Express Chipset G Auxiliary fan header Figure 6. Thermal Sensors and Fan Headers Product Description 1.13 Power Management Power management is implemented at several levels, including: • Software support through Advanced Configuration and Power Interface (ACPI) • Hardware support: . Power connector . Fan headers . LAN wake capabilities . Instantly Available PC technology . Wake from USB . Power Management Event signal (PME#) wake-up support . PCI Express WAKE# signal support . Wake from Consumer IR 1.13.1 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 this board requires an operating system that provides full ACPI support. ACPI features include: • Plug and Play (including bus and device enumeration) • Power management control of individual devices, add-in boards (some add-in boards may require an ACPI-aware driver), video displays, and hard disk drives • Methods for achieving less than 15-watt system operation in the power-on/standby sleeping state • A Soft-off feature that enables the operating system to power-off the computer • Support for multiple wake-up events (see Table 8 on page 33) • Support for a front panel power and sleep mode switch Table 6 lists the system states based on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system. Table 6. Effects of Pressing the Power Switch If the system is in this state… …and the power switch is pressed for …the system enters this state Off (ACPI G2/G5 – Soft off) Less than four seconds Power-on (ACPI G0 – working state) On (ACPI G0 – working state) Less than four seconds Soft-off/Standby (ACPI G1 – sleeping state) On (ACPI G0 – working state) More than six seconds Fail safe power-off (ACPI G2/G5 – Soft off) Sleep (ACPI G1 – sleeping state) Less than four seconds Wake-up (ACPI G0 – working state) Sleep (ACPI G1 – sleeping state) More than six seconds Power-off (ACPI G2/G5 – Soft off) Intel Desktop Board DP67BG Technical Product Specification 1.13.1.1 System States and Power States Under ACPI, the operating system directs all system and device power state transitions. The operating system puts devices in and out of low-power states based on user preferences and knowledge of how devices are being used by applications. Devices that are not being used can be turned off. The operating system uses information from applications and user settings to put the system as a whole into a low-power state. Table 7 lists the power states supported by the board along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. Table 7. Power States and Targeted System Power Global States Sleeping States Processor States Device States Targeted System Power (Note 1) G0 – working state S0 – working C0 – working D0 – working state. Full power > 30 W G1 – sleeping state S3 – Suspend to RAM. Context saved to RAM. No power D3 – no power except for wake-up logic. Power < 5 W (Note 2) G1 – sleeping state S4 – Suspend to disk. Context saved to disk. No power D3 – no power except for wake-up logic. Power < 5 W (Note 2) G2/S5 S5 – Soft off. Context not saved. Cold boot is required. No power D3 – no power except for wake-up logic. Power < 5 W (Note 2) G3 – mechanical off AC power is disconnected from the computer. No power to the system. No power D3 – no power for wake-up logic, except when provided by battery or e...