X6800 Datasheet, PDF (104/122 Pages) Intel Corporation – Core2 Extreme Processor

Boxed Processor Specifications
Figure 35.
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. Figure 36 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.
Boxed Processor Fan Heatsink Power Cable Connector Description
Pin Signal
1 GND
2 +12 V
3 SENSE
4 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.
Table 38.
1 2 34
Fan Heatsink Power and Signal Specifications
Description
Min Typ
+12 V: 12 volt fan power supply
11.4
12
IC:
- Maximum fan steady-state current draw —
1.2
- Average fan steady-state current draw
—
0.5
- Max fan start-up current draw
—
2.2
- Fan start-up current draw maximum
duration
—
1.0
Max
12.6
—
—
—
—
SENSE: SENSE frequency
—
2
—
CONTROL
21
25
28
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 pull-up resistor for this signal to maximum of 5.25 V.
B d P P C bl
Unit
V
Notes
-
A
A
-
A
Second
pulses per
fan
1
revolution
Hz
2, 3
104
Datasheet