User`s manual

2-12
X8QB6-F/X8QBE-F Motherboard User’s Manual
2-3 Special Features
Recovery from AC Power Loss
The Basic I/O System (BIOS) provides a setting for you to determine how the sys-
tem will respond when AC power is lost and then restored to the system. You can
choose for the system to remain powered off (in which case you must press the
power switch to turn it back on), or for it to automatically return to the power- on
state. See the Advanced BIOS Setup section for this setting. The default setting
is Last State.
2-4 PC Health Monitoring
This section describes the PC health monitoring features of the motherboard. This
motherboard has an onboard System_Hardware_Monitor chip that supports PC
health monitoring. An onboard voltage monitor will scan the following onboard volt-
ages continuously: CPU1 Vcore, CPU2 Vcore, CPU3 Vcore, CPU4 Vcore, +1.0V,
+1.2V, +1.8V, +1.1V, +12V, 1.5V, 3.3V V, 3.3VSB, Battery Voltage, and IOPV12.
Once a voltage becomes unstable, a warning is given or an error message is sent
to the screen. The user can adjust the voltage thresholds to defi ne the sensitivity
of the voltage monitor.
Fan Status Monitor with Firmware Control
The PC health monitor can check the RPM status of the cooling fans. The onboard
CPU and chassis fans are controlled by BIOS Thermal Management (under the
Hardware Monitoring section in the Advanced Setting).
Environmental Temperature Control
A thermal control sensor monitors the CPU temperature in real time and will turn
on the thermal control fan whenever the CPU temperature exceeds a user-defi ned
threshold. The overheat circuitry runs independently from the CPU. Once it detects
that the CPU temperature is too high, it will automatically turn on the thermal fan
control to prevent the CPU from overheating. The onboard chassis thermal circuitry
can monitor the overall system temperature and alert the user when the chassis
temperature is too high.
Note: To avoid possible system overheating, please be sure to provide
adequate airfl ow to your system.