Intel i7-960 AT80601002727AA User Manual

92

Datasheet 

The boxed processor fan heatsink will not weigh more than 550 grams. See 

and the appropriate processor Thermal and Mechanical Design Guidelines (see 

). for details on the processor weight and heatsink requirements.

The boxed processor thermal solution requires a heatsink attach clip assembly, to 

secure the processor and fan heatsink in the baseboard socket. The boxed processor 

will ship with the heatsink attach clip assembly. 

The boxed processor fan heatsink requires a +12 V power supply. A fan power cable 

will be shipped with the boxed processor to draw power from a power header on the 

baseboard. The power cable connector and pinout are shown in 

. Baseboards 

must provide a matched power header to support the boxed processor. 

 

contains specifications for the input and output signals at the fan heatsink connector. 

The fan heatsink outputs a SENSE signal, which is an open- collector output that pulses 

at a rate of 2 pulses per fan revolution. A baseboard pull-up resistor provides V

OH

 to 

match the system board-mounted fan speed monitor requirements, if applicable. Use of 

the SENSE signal is optional. If the SENSE signal is not used, pin 3 of the connector 

should be tied to GND.

The fan heatsink receives a PWM signal from the motherboard from the 4th pin of the 

connector labeled as CONTROL.

The boxed processor's fanheat sink requires a constant +12 V supplied to pin 2 and 

does not support variable voltage control or 3-pin PWM control. 

The power header on the baseboard must be positioned to allow the fan heatsink power 

cable to reach it. The power header identification and location should be documented in 

the platform documentation, or on the system board itself. 

 shows the 

location of the fan power connector relative to the processor socket. The baseboard 

power header should be positioned within 110 mm [4.33 inches] from the center of the 

processor socket.

Pin

Signal

1 2 3 4

1

2

3

4

GND

+12 V

SENSE
CONTROL

Straight square pin, 4-pin terminal housing with
polarizing ribs and friction locking ramp.

0.100" pitch, 0.025" square pin width.

Match with straight pin, friction lock header on
mainboard.