Balanced Technology Extended (BTX) Boxed Processor Specifications
In addition, Type I TMA must be used with Type I chassis only and Type II TMA with
Type II chassis only. Type I TMA will not fit in a Type II chassis due to the height
difference. In the event a Type II TMA is installed in a Type I chassis, the gasket on the
chassis will not seal against the Type II TMA and poor acoustic performance will occur
as a result.
8.3.2
Variable Speed Fan
The boxed processor fan will operate at different speeds over a short range of
temperatures based on a thermistor located in the fan hub area. This allows the boxed
processor fan to operate at a lower speed and noise level while thermistor
temperatures are low. If the thermistor senses a temperatures increase beyond a lower
set point, the fan speed will rise linearly with the temperature until the higher set point
is reached. At that point, the fan speed is at its maximum. As fan speed increases, so
do fan noise levels. These set points are represented in Figure 32 and Table 37. The
internal chassis temperature should be kept below 35.5ºC. Meeting the processor’s
temperature specification (see Chapter 5) is the responsibility of the system integrator.
Note:
The motherboard must supply a constant +12 V to the processor’s power header to
ensure proper operation of the variable speed fan for the boxed processor (refer to
Table 37) for the specific requirements).
Figure 32.
Boxed Processor TMA Set Points
Higher Set Point
Highest Noise Level
Increasing Fan
Speed & Noise
Lower Set Point
Lowest Noise Level
X
Y
Z
Internal Chassis Temperature (Degrees C)
102
Datasheet
INTEL [ INTEL ]
