Electrical Requirements; Boxed Processor Fan Heatsink Power Cable Connector Description - Intel BX80605X3440 - Quad Core Xeon X3440 Reference

10.2.2 Boxed Processor Fan Heatsink Weight
The boxed processor fan heatsink will not weigh more than 450 grams.
10.2.3 Boxed Processor Retention Mechanism and Heatsink
Attach Clip Assembly
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.
10.3

Electrical Requirements

10.3.1 Fan Heatsink Power Supply
The boxed processor's 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.
Table 10-1
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
match the system board-moun ted 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 heade r identification and location should be documented in
the platform documentation, or on the system board itself.
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.
Figure 10-5. Boxed Processor Fan Heatsink Power Cable Connector Description
74
contains specifications for the input and output signals at the fan heatsink
Signal
Pin
1 GND
+12 V
2
3 SENSE
CONTROL
4
1 2 3 4
Boxed Processor Specifications
Figure
Figure 10-6
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.
Thermal/Mechanical Specifications and Design Guidelines
10-5.
to
OH
shows the