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the sensitivity of the voltage monitor.
Three-Fan Status Monitor with Firmware/Software On/Off
Control
The PC health monitor can check the RPM status of the cooling fans. The
onboard 3-pin CPU and chassis fans are controlled by the power management
functions. The thermal fan is controlled by the overheat detection logic.
Environmental Temperature Control
The 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-
defined threshold. The overheat circuitry runs independently from the CPU. It
can continue to monitor for overheat conditions even when the CPU is in sleep
mode. Once it detects that the CPU temperature is too high, it will automatically
turn on the thermal control fan to prevent any overheat damage to the CPU. The
onboard chassis thermal circuitry can monitor the overall system temperature
and alert users when the chassis temperature is too high.
CPU Fan Auto-Off in Sleep Mode
The CPU fan activates when the power is turned on. It can be turned off when
the CPU is in sleep mode. When in sleep mode, the CPU will not run at full
power, thereby generating less heat.
CPU Overheat LED and Control
This feature is available when the user enables the CPU overheat warning function
in the BIOS (see page 4-18). This allows the user to define an overheat tempera-
ture. When this temperature is exceeded, both the overheat fan and the warning
LED are triggered.
System Resource Alert
This feature is available when used with the Super Doctor utility program. It
is used to notify the user of certain system events, such as a user-defined
CPU temperature being exceeded, voltages sensed as being too high or
low, fan failure and chassis intrusion.
a microswitch to be attached between the chassis and the JL1 header on
the motherboard.)
Chapter 1: Introduction
(Utilizing chassis intrusion requires
1-15
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