Техническая Спецификация для Intel P4500 CP80617004803AA
Модели
CP80617004803AA
Datasheet
59
Thermal Management
Adjusting the operating frequency (via the core ratio multiplier) and input voltage
(via the VID signals).
(via the VID signals).
Modulating (starting and stopping) the internal processor core clocks (duty cycle).
The Adaptive Thermal Monitor dynamically selects the appropriate method. BIOS is not
required to select a specific method as with previous-generation processors supporting
Intel® Thermal Monitor 1 (TM1) or Intel® Thermal Monitor 2 (TM2). The temperature
at which the Adaptive Thermal Monitor activates the Thermal Control Circuit is not user
configurable but is software visible in the IA32_TEMPERATURE_TARGET (0x1A2) MSR,
Bits 23:16.
required to select a specific method as with previous-generation processors supporting
Intel® Thermal Monitor 1 (TM1) or Intel® Thermal Monitor 2 (TM2). The temperature
at which the Adaptive Thermal Monitor activates the Thermal Control Circuit is not user
configurable but is software visible in the IA32_TEMPERATURE_TARGET (0x1A2) MSR,
Bits 23:16.
The Adaptive Thermal Monitor does not require any additional hardware,
software drivers, or interrupt handling routines. Note that the Adaptive Thermal
Monitor is not intended as a mechanism to maintain processor TDP. The system design
should provide a thermal solution that can maintain TDP within its intended usage
range.
Monitor is not intended as a mechanism to maintain processor TDP. The system design
should provide a thermal solution that can maintain TDP within its intended usage
range.
5.2.1.1.1
Frequency/VID Control
Upon TCC activation, the processor core attempts to dynamically reduce processor core
power by lowering the frequency and voltage operating point. The operating points are
automatically calculated by the processor core itself and do not require the BIOS to
program them as with previous generations of Intel processors. The processor core will
scale the operating points such that:
power by lowering the frequency and voltage operating point. The operating points are
automatically calculated by the processor core itself and do not require the BIOS to
program them as with previous generations of Intel processors. The processor core will
scale the operating points such that:
The voltage will be optimized according to the temperature, the core bus ratio, and
number of cores in deep C-states.
number of cores in deep C-states.
The core power and temperature are reduced while minimizing performance
degradation.
degradation.
A small amount of hysteresis has been included to prevent an excessive amount of
operating point transitions when the processor temperature is near its maximum
operating temperature. Once the temperature has dropped below the maximum
operating temperature and the hysteresis timer has expired, the operating frequency
and voltage transition back to the normal system operating point. This is illustrated in
operating point transitions when the processor temperature is near its maximum
operating temperature. Once the temperature has dropped below the maximum
operating temperature and the hysteresis timer has expired, the operating frequency
and voltage transition back to the normal system operating point. This is illustrated in
Figure 5-12
.