Intel B980 FF8062700997802 データシート
製品コード
FF8062700997802
Datasheet
79
Thermal Specifications and Design Considerations
The PROCHOT# signal is asserted when a high temperature situation is detected,
regardless of whether Thermal Monitor or Thermal Monitor 2 is enabled.
It should be noted that the Thermal Monitor 2 TCC cannot be activated via the on
demand mode. The Thermal Monitor TCC, however, can be activated through the use of
the on demand mode.
5.2.3
On-Demand Mode
The processor provides an auxiliary mechanism that allows system software to force
the processor to reduce its power consumption. This mechanism is referred to as “On-
Demand” mode and is distinct from the Thermal Monitor feature. On-Demand mode is
intended as a means to reduce system level power consumption. Systems using the
processor must not rely on software usage of this mechanism to limit the processor
temperature.
The processor provides an auxiliary mechanism that allows system software to force
the processor to reduce its power consumption. This mechanism is referred to as “On-
Demand” mode and is distinct from the Thermal Monitor and Thermal Monitor 2
features. On-Demand mode is intended as a means to reduce system level power
consumption. Systems must not rely on software usage of this mechanism to limit the
processor temperature. If bit 4 of the IA32_CLOCK_MODULATION MSR is set to a ‘1’,
the processor will immediately reduce its power consumption via modulation (starting
and stopping) of the internal core clock, independent of the processor temperature.
When using On-Demand mode, the duty cycle of the clock modulation is programmable
via bits 3:1 of the same IA32_CLOCK_MODULATION MSR. In On-Demand mode, the
duty cycle can be programmed from 12.5% on/ 87.5% off to 87.5% on/ 12.5% off in
12.5% increments. On-Demand mode may be used in conjunction with the Thermal
Monitor; however, if the system tries to enable On-Demand mode at the same time the
TCC is engaged, the factory configured duty cycle of the TCC will override the duty
cycle selected by the On-Demand mode.
Figure 18.
Thermal Monitor 2 Frequency and Voltage Ordering
VID
Frequency
Temperature
T
TM2
f
MAX
f
TM2
VID
VID
TM2
PROCHOT#