Boxed Processor Specifications
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. Figure 22 shows the
location of the fan power connector relative to the processor socket. The baseboard
power header should be positioned within 4.33 inches from the center of the processor
socket.
Figure 21.
Boxed Processor Fan Heatsink Power Cable Connector Description
Signal
Pin
Straight square pin, 4-pin terminal housing with
polarizing ribs and friction locking ramp.
1
2
3
4
GND
+12 V
0.100" pitch, 0.025" square pin width.
SENSE
CONTROL
Match with straight pin, friction lock header on
mainboard.
3 4
1 2
Table 35.
Fan Heatsink Power and Signal Specifications
Description
Min
Typ
Max
Unit
Notes
+12 V: 12 volt fan power supply
10.2
12
13.8
V
IC:
Peak Fan current draw
Fan start-up current draw
Fan start-up current draw maximum duration
—
—
—
1.1
—
1.5
2.2
1.0
A
A
—
Second
pulses per
fan
1
SENSE: SENSE frequency
—
2
—
revolution
2,3
CONTROL
21
25
28
kHz
NOTES:
1. Baseboard should pull this pin up to 5 V with a resistor.
2. Open Drain Type, Pulse Width Modulated.
3. Fan will have a pull-up resistor to 4.75 V, maximum 5.25 V.
92
Datasheet
INTEL [ INTEL ]
