Artesyn NITX-300-ET-DVI Installation and Use (August 2014) - Manual (Page 26)

Hardware Preparation and Installation
NITX-300-ET-DVI Installation and Use (6806800N97B) 26
The following diagram shows thermal management strategy:
A PNP thermal transistor is integrated in Tunnel Creek; it is used as a diode and it connects to
an external digital thermal sensor (EMC2103). The CPU can get the data of junction
temperature through the System Management (SM) bus. Note that this is an inaccurate value
and the temperature offset must be taken into account through the reading of the CPU’s
Model Specific Registers (MSR).
Intel Thermal Monitor: The Intel thermal monitor controls processor temperature by
modulating (starting and stopping) the processor core clocks when the processor silicon
reaches its maximum operating temperature. Signal "PROCHOT #" is used in this mode, when
the processor temperature goes up to 110
°C , the PROCHOT# is output and active, it indicates
that the processor thermal control circuit is activated. A red LED D2 can show the "processor
hot" status.
Figure 2-1 Board Thermal Management Diagram