Fan Response With T; Ambient Aware Fsc - Intel Core i7-800 Specifications

For a processor specification based on a T
equal to or greater than T
for the T
AMBIENT
1156 (DHA-A), this would be about 2150 RPM at 35 °C. This is graphically displayed as
the dashed line in
This is an improvement over the ambient unaware system but is not fully optimized for
acoustic benefit. The DTS thermal specification required Ψ
speed in this scenario is 1500 RPM. This is less than thermistor controlled speed of
2150 RPM — even if the assumption is a T
in Figure
The shaded area displayed in
For simplicity, the graph shows a linear acceleration of the fans from T
T
CONTROL
As the processor workload continues to increase the DTS value will increase and the
FSC algorithm will linearly increase the fan speed from the 1500 RPM at DTS = -20 to
2150 RPM at DTS value = -1.
Figure 7-7.

Fan Response with T

56
CONTROL
as controlled by the thermistor in thermal solution. For the RCFH7-
Figure 7-7.
7-7.
Figure 7-7
as has been Intel's guidance for simple fan speed control algorithms.
Aware FSC
AMBIENT
Sensor Based Thermal Specification Design Guidance
thermal profile, when the DTS value is
CASE
, the fan speed is accelerated to maximum fan speed
= 35 °C. This is graphically displayed
AMBIENT
is where DTS values are less than T
Thermal/Mechanical Specifications and Design Guidelines
and therefore the fan
CA
CONTROL
- 10 to
CONTROL
.