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| 型号： | BX80551PG2800FN |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 2800 MHz, MICROPROCESSOR, PBGA775 |
| 封装： | FLIP CHIP, LGA-775 |
| 文件页数： | 5/105页 |
| 文件大小： | 1870K |
| 代理商： | BX80551PG2800FN |
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102
Datasheet
Balanced Technology Extended (BTX) Type I Boxed Processor Specifications
8.3.2
Variable Speed Fan
If the boxed processor fan heatsink 4-pin connector is connected to a 3-pin motherboard header, it
will operate as follows:
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 does fan noise levels. These set points are
represented in Figure 8-6 and Table 8-2. The internal chassis temperature should be kept below
38 C. 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 8-1) for the specific
requirements.
Figure 8-6. Boxed Processor TMA Set Points
Table 8-2. Balanced Technology Extended (BTX) Type I Boxed Processor TMA Set Points for
3-wire Operation
Boxed Processor
TMA Set Point (C)
Boxed Processor Fan Speed
Notes
X
≤ 23
When the internal chassis temperature is below or equal to this set point,
the fan operates at its lowest speed. Recommended maximum internal
chassis temperature for nominal operating environment.
1
NOTES:
1.
Set point variance is approximately ±1 °C from fan heatsink to fan heatsink.
Y = 29
When the internal chassis temperature is at this point, the fan operates
between its lowest and highest speeds. Recommended maximum
internal chassis temperature for worst-case operating environment.
Z
≥35
When the internal chassis temperature is above or equal to this set point,
the fan operates at its highest speed.
Lower Set Point
Lowest Noise Level
Internal Chassis Temperature (Degrees C)
X
YZ
Increasing Fan
Speed & Noise
Higher Set Point
Highest Noise Level
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