641 datasheet(92/106 Pages) INTEL

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Boxed Processor Specifications

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. 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

Table 35.

Fan Heatsink Power and Signal Specifications

Description

Min

Typ

Max

Unit

Notes

+12 V: 12 volt fan power supply

10.2

13.8

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

Second

SENSE: SENSE frequency

—

pulses per

fan

revolution

NOTES:

1. Baseboard should pull this pin up to 5 V with a resistor.

CONTROL

kHz

2,3

2. Open Drain Type, Pulse Width Modulated.

3. Fan will have a pull-up resistor to 4.75 V, maximum 5.25 V.

Signal

12 34

GND

+12 V

SENSE

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.

641 Datasheet(PDF) 92 Page - Intel Corporation

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