Filter
Top Products
Intel Desktop Board D975XBX2 Product Guide
20
Chassis Intrusion
The desktop 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 29
on page 51 for the location of the chassis intrusion header.
Power Management Features
Power management is implemented at several levels, including:
• Advanced Configuration and Power Interface (ACPI)
• Hardware support:
― 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
― Onboard power button
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.
Fan Connectors
Desktop Board D975XBX2 has four chassis fan connectors (three 3-pin and one 4-pin),
and one processor fan connector (4-pin).
Fan Speed Control (Intel
®
Precision Cooling Technology)
Intel Precision Cooling Technology automatically adjusts the processor fan speed based
on the processor 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.