Intel Core2 Duo Processor E8000 and E7000 Series and Intel Pentium Processor E5000 Series

Processor Thermal/Mechanical Information
20 Thermal and Mechanical Design Guidelines
The thermal profiles for the Intel
®
Core™2 Duo processor E8000 series with 6 MB
cache, Intel
®
Core™2 Duo processor E7000 series with 3 MB cache, and Intel
®
Pentium
®
dual-core processor E5000 series with 2 MB cache are defined such that
there is a single thermal solution for all of the 775_VR_CONFIG_06 processors.
To determine compliance to the thermal profile, a measurement of the actual
processor power dissipation is required. The measured power is plotted on the
Thermal Profile to determine the maximum case temperature. Using the example in
Figure 2-3 for a processor dissipating 50 W the maximum case temperature is 58° C.
See the datasheet for the thermal profile.
Figure
2-3. Example Thermal Profile
40
50
60
70
0 10203040506070
Power (W)
Case Temperature (°C)
Thermal Profile
TDP
2.2.4 T
CONTROL
T
CONTROL
defines the maximum operating temperature for the digital thermal sensor
when the thermal solution fan speed is being controlled by the digital thermal sensor.
The T
CONTROL
parameter defines a very specific processor operating region where fan
speed can be reduced. This allows the system integrator a method to reduce the
acoustic noise of the processor cooling solution, while maintaining compliance to the
processor thermal specification.
Note: The T
CONTROL
value for the processor is relative to the Thermal Control Circuit (TCC)
activation set point which will be seen as 0 via the digital thermal sensor. As a result
the T
CONTROL
value will always be a negative number. See Chapter 4 for the
discussion the thermal management logic and features and Chapter
7 on Intel
®
Quiet
System Technology (Intel
®
QST).
The value of T
CONTROL
is driven by a number of factors. One of the most significant of
these is the processor idle power. As a result a processor with a high (closer to 0 )
T
CONTROL
will dissipate more power than a part with lower value (farther from 0, e.g.
larger negative number) of T
CONTROL
when running the same application.