Boxed Processor Fan Heatsink Power Cable Connector Description; Baseboard Power Header Placement Relative To Processor Socket; Fan Heatsink Power And Signal Specifications - Intel Q9300 - Core 2 Quad 2.5 GHz 6M L2 Cache 1333MHz FSB LGA775 Quad-Core Processor Datasheet

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.
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 7-5.

Boxed Processor Fan Heatsink Power Cable Connector Description

Table 7-1.

Fan Heatsink Power and Signal Specifications

+12 V: 12 volt fan power supply
IC:
- Maximum fan steady-state current draw
- Average fan steady-state current draw
- Maximum fan start-up current draw
- Fan start-up current draw maximum
duration
SENSE: SENSE frequency
CONTROL
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.
Figure 7-6.

Baseboard Power Header Placement Relative to Processor Socket

98
Signal
Pin
1 GND
2 +12 V
3 SENSE
CONTROL
4
1 2 3 4
Description
C
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.
Min Typ
11.4 12
— 1.2
— 0.5
— 2.2
— 1.0
— 2
21 25
B
Boxed Processor Specifications
Figure 7-6 shows the
Max Unit Notes
V
12.6
— A
— A
— A
— Second
pulses per
— fan
revolution
28 kHz
R110
[4.33]
Datasheet
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1
2, 3