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Thermal Considerations
6.2.2
Adaptive Thermal Monitor
The Adaptive Thermal Monitor feature reduces the processor power consumption and the tem-
perature when the processor silicon exceeds its maximum operating temperature until the pro-
cessor operates at or below its maximum operating temperature.
The processor core power reduction is achieved by:
• Frequency/sVID Control (by reducing of processor core voltage)
• Clock Modulation (by turning the internal processor core clocks off and on)
Adaptive Thermal Monitor dynamically selects the appropriate method. uEFI BIOS is not re-
quired to select a specific method as with previous-generation processors supporting Intel®
Thermal Monitor 1 (TM1) and Intel® Thermal Monitor 2 (TM2).
The Adaptive Thermal Monitor does not require any additional hardware, software drivers, or
interrupt handling routines.
6.2.2.1
Frequency/sVID Control
Frequency/sVID Control reduces the processor's operating frequency (using the core ratio
multiplier) and the input voltage (using serial VID signals). This combination of lower frequency
and VID results in a reduction of the processor power consumption.
When the processor temperature reaches the TCC activation point, the event is reported via
an external signal to the IPMI controller.
Running the processor at the lower frequency and voltage will reduce power consumption and
should allow the processor to cool off. If the processor temperature does not drop below its
maximum operating temperature, a second frequency and voltage transition will take place.
This sequence of temperature checking and Frequency/sVID reduction will continue until either
the minimum frequency has been reached or the processor temperature has dropped below its
maximum operating temperature. If the processor temperature remains above its maximum op-
erating temperature even after the minimum frequency has been reached, then Clock Modula-
tion at that minimum frequency will be initiated.
Note ...
When the TH LED on the front panel is lit red after boot-up, it indicates that the
processor die temperature is above 100°C.
6.2.2.2
Clock Modulation
Clock Modulation reduces power consumption by rapidly turning the internal processor core
clocks off and on at a duty cycle that should reduce power dissipation (typically a 30-50% duty
cycle).
Once the temperature has dropped below the maximum operating temperature, the TCC goes
inactive and clock modulation ceases.
Note ...
When the TH LED on the front panel is lit red after boot-up, it indicates that the
processor die temperature is above 100°C.
Page 6 - 4
CP6003-RA/RC
ID 1046-3890, Rev. 1.0
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