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The fan power header on the baseboard must be positioned to allow the fan heat sink
power cable to reach it. The fan power header identification and location must be
documented in the suppliers platform documentation, or on the baseboard itself. The
baseboard fan power header should be positioned within 177.8 mm [7 in.] from the
center of the processor socket.
Table 8-1.
PWM Fan Frequency Specifications for 4-Pin Active CEK Thermal Solution
Description
PWM Control
Frequency Range
Table 8-2.
Fan Specifications for 4-Pin Active CEK Thermal Solution
Description1
+12 V: 12 volt fan power supply
IC: Fan Current Draw
SENSE: SENSE frequency
Note:
1.
System board should pull this pin up to Vcc with a resistor
Figure 8-11. Fan Cable Connector Pin Out for 4-Pin Active CEK Thermal Solution
Table 8-3.
Fan Cable Connector Pin Out for 4-Pin Active CEK Thermal Solution
Pin Number
Note:
System board should provide an open drain / open collector for pin 4. Fan will pull this pin up to a
specific voltage (5.25V max).
8.3.2
Boxed Processor Cooling Requirements
As previously stated the boxed processor will be available in two product
configurations. Each configuration will require unique design considerations. Meeting
the processor's temperature specifications is also the function of the thermal design of
the entire system, and ultimately the responsibility of the system integrator. The
processor temperature specifications are found in
122
Min Frequency
21,000
Min
10.8
N/A
2
1
2
3
Sense: 2 pulses per revolution
4
Control: 21 KHz-28 KHz
Nominal Frequency
25,000
Typ
Max
Steady
Steady
12
12
1
1.25
2
2
Signal
Ground
Power: (+12 V)
Section 6
Quad-Core Intel® Xeon® Processor 5300 Series Datasheet
Boxed Processor Specifications
Max Frequency
Unit
28,000
Hz
Max
Unit
Startup
13.2
V
1.5
A
Pulses per fan
2
revolution
Color
Black
Yellow
Green
Blue
of this document.
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