Intel Core 2 Quad Q6700 Datasheet download pdf (Page 95)

Datasheet 95

Boxed Processor Specifications

If the boxed processor fan heatsink 4-pin connector is connected to a 4-pin

motherboard header and the motherboard is designed with a fan speed controller with

PWM output (CONTROL see Table 32) and remote thermal diode measurement

capability the boxed processor will operate as follows:

As processor power has increased the required thermal solutions have generated

increasingly more noise. Intel has added an option to the boxed processor that allows

system integrators to have a quieter system in the most common usage.

The 4th wire PWM solution provides better control over chassis acoustics. This is

achieved by more accurate measurement of processor die temperature through the

processor's Digital Thermal Sensors (DTS) and PECI. Fan RPM is modulated through the

use of an ASIC located on the motherboard that sends out a PWM control signal to the

4th pin of the connector labeled as CONTROL. The fan speed is based on actual

processor temperature instead of internal ambient chassis temperatures.

Figure 30. Boxed Processor Fan Heatsink Set Points

Table 33. Fan Heatsink Power and Signal Specifications

Boxed Processor Fan

Heatsink Set Point (

ºC)

Boxed Processor Fan Speed Notes

X ≤ 30

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.

NOTES:

1. Set point variance is approximately ± 1 °C from fan heatsink to fan heatsink.

Y = 35

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 ≥ 39

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)

Increasing Fan

Speed & Noise

Higher Set Point

Highest Noise Level

1 2 ... 90 91 92 93 94 95 96 97 98

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Intel Core 2 Quad Q6700 Datasheet Page 95

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