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6 - English A26361-D1382-Z120-1-7419
Temperature / System monitoring
Temperature and system monitoring aim to reliably protect the computer hardware against damage
caused by overheating. In addition, any unnecessary noise is also prevented by reducing the fan
speed, and information is provided about the system status. Cover monitoring protects the system
from unauthorised opening.
An onboard controller developed by Fujitsu Siemens Computers controls the temperature and
system monitoring.
The following functions are supported:
Temperature monitoring:
Measurement of the processor and the system temperature with an onboard temperature sensor.
Temperature control:
The temperature is controlled by adjusting the fan speed and/or by reducing the clock frequency of
the processor. The clock frequency of the processor is dependent upon the setting in the BIOS Setup.
Temperature-dependent processor speed control enables a reduced fan speed, decreasing noise.
Fan monitoring:
Fans which have been removed, blocked or sticky fans are detected. Blocked or sticky fans are
operated with 12 V pulse voltage. If the device has a monitored fan removed while the system is
switched off this is indicated by the message LED when the system is switched on again and
processed by the BIOS or the application.
Fan control:
With the exception of the auxiliary fan (AUX), the fans are regulated according to temperature.
Sensor monitoring:
The removal of, or a fault in, a temperature sensor is detected. Should this happen all fans
monitored by this sensor run at maximum speed, to achieve the greatest possible protection of the
hardware. If the device has a monitored fan removed while the system is switched off this is
indicated by the message LED when the system is switched on again and processed by the BIOS or
the application.
Cover monitoring:
Unauthorised opening of the cover is detected, even when the system is switched off. However, this
will only be indicated when the system is switched on again.