Fan Speed Control (Fsc) Design Process; Thermal Solution Performance Versus Fan Speed - Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - THERMAL MECHANICAL SPECIFICATIONS AND DESIGN GUIDELINES 01-2011 Specifications

Sensor Based Thermal Specification Design Guidance
Note: When selecting a thermal solution from a thermal vendor, the characterization data
should be requested directly from them as a part of their thermal solution collateral.
Figure 8-5.

Thermal Solution Performance versus Fan Speed

Note: This data is taken from the preliminary evaluation of the validation of the RCBF7-1156
(DHA-A) reference processor thermal solution. The 
Table 8-3
8.4

Fan Speed Control (FSC) Design Process

The next step is to incorporate the thermal solution characterization data into the
algorithms for the device controlling the fans.
As a reminder the requirements are:
• When the DTS value is at or below T
with prior processors.
• When DTS is above T
 versus RPM to achieve the necessary level of cooling.
CA
DTS 1.1 provides another option to do fan speed control without the Tambient data.
Please refer to
implementations. The first is a FSC system that is not provided the T
information and a FSC system that is provided data on the current T
method will result in a thermally compliant solution and some acoustic benefit by
operating the processor closer to the thermal profile. But only the T
system can fully utilize the specification for optimized acoustic performance.
In the development of the FSC algorithm it should be noted that the T
expected to change at a significantly slower rate than the DTS value. The DTS value will
be driven by the workload on the processor and the thermal solution will be required to
respond to this much more rapidly than the changes in T
Thermal/Mechanical Specifications and Design Guidelines
RPM vs. Measured Thermal Performance
0.450
0.400
0.350
0.300
at the end of this chapter.
CONTROL
Section 8.4.3 for more details.This chapter will discuss two
RPM
versus RPM data is available in
CA
, the fans can be slowed down - just as
CONTROL
, FSC algorithms will use knowledge of T
AMBIENT
AMBIENT
. Either
AMBIENT
aware FSC
AMBIENT
is
AMBIENT
.
AMBIENT
and
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