Intel D945GCZ Benutzerhandbuch

21 

Power management is implemented at several levels, including: 
•  Advanced Configuration and Power Interface (ACPI) 
•  Hardware support: 

⎯  Power connectors 
⎯  Fan connectors 
⎯  Suspend to RAM (Instantly Available PC technology) 
⎯  Wake from USB 
⎯  Wake from PS/2 keyboard/mouse 
⎯  PME# wakeup support 

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. 

The desktop boards have three power connectors.  See Figure 23 on page 46 for the location of the 
power connectors. 

The desktop board has a 4-pin processor fan header and two 3-pin chassis fan headers.  See  
Figure 22 on page 45 for the location of the fan headers. 

®

Intel Precision Cooling Technology automatically adjusts the processor fan speed based on the 
processor thermal diode temperature and adjusts the chassis fan speeds depending on the system 
temperature.  System fan noise may be reduced by operating controlled chassis and processor fans 
at the minimum necessary speeds.  

 

The processor and chassis fan speed control features can be disabled independently through the 
desktop board BIOS.  Disabling the processor fan speed control will result in the fan operating at 
full speed if it is not a self controlled fan.  It is recommended that processor fan speed control 
remain enabled (default BIOS setting) when using the processor fan heat-sink included with 
Intel

®

 boxed processors.  Disabling the chassis fan speed control results in chassis fans always 

operating at full speed.  The chassis fan speed control feature should be disabled if a self-controlled 
chassis fan is attached to any controlled chassis fan header. 
The overall system noise reduction will vary based on system configuration and environment.