Intel Quiet System Technology (Intel Qst); Intel ® Quiet System Technology Algorithm - Intel Q9450 - Core 2 Quad Quad-Core Processor Design Manual

Intel® Quiet System Technology (Intel® QST)
6 Intel
Technology (Intel
In the Intel
is being introduced. It is composed of a Manageability Engine (ME) in the Graphics
Memory Controller Hub (GMCH) which executes the Intel
®
(Intel QST) algorithm and the ICH8 containing the sensor bus and fan control
circuits.
The ME provides integrated fan speed control in lieu of the mechanisms available in a
SIO or a stand-alone ASIC. The Intel QST is time based as compared to the linear or
state control used by the current generation of FSC devices.
A short discussion of Intel QST will follow along with thermal solution design
recommendations. For a complete discussion of programming the Intel QST in the ME
consult the Intel
Manual.
6.1 Intel
The objective of Intel QST is to minimize the system acoustics by more closely
controlling the thermal sensors to the corresponding processor or chipset device
T
CONTROL
control algorithm and a Fan Output Weighting Matrix. The PID algorithm takes into
account the difference between the current temperature and the target (T
rate of change and direction of change to minimize the required fan speed change.
The Fan Output Weighting Matrix uses the effects of each fan on a thermal sensor to
minimize the required fan speed changes
Figure 19 shows in a very simple manner how Intel QST works. See the Intel
System Technology (Intel
discussion of the inputs and response.
Thermal and Mechanical Design Guidelines
®
Quiet System
®
965 Express chipset family a new control algorithm for fan speed control
®
Quiet System Technology (Intel
®
Quiet System Technology Algorithm
value. This is achieved by the use of a Proportional-Integral-Derivative (PID)
®
QST) Configuration and Tuning Manual for a detail
®
QST)
®
Quiet System Technology
®
QST) Configuration and Tuning
), the
CONTROL
®
Quiet
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