Intel BX80569QX6850 Datasheet download pdf (Page 116)

Balanced Technology Extended (BTX) Boxed Processor Specifications

116 Datasheet

8.2 Electrical Requirements

8.2.1 Thermal Module Assembly Power Supply

The boxed processor's Thermal Module Assembly (TMA) requires a +12 V power supply.

The TMA will include power cable to power the integrated fan and will plug into the 4-

wire fan header on the baseboard. The power cable connector and pinout are shown in

Figure 45. Baseboards must provide a compatible power header to support the boxed

processor. Table 40contains specifications for the input and output signals at the TMA.

The TMA outputs a SENSE signal, which is an open-collector output that pulses at a rate

of 2 pulses per fan revolution. A baseboard pull-up resistor provides V

to match the

system board-mounted fan speed monitor requirements, if applicable. Use of the

SENSE signal is optional. If the SENSE signal is not used, pin 3 of the connector should

be tied to GND.

The TMA receives a Pulse Width Modulation (PWM) signal from the motherboard from

the 4

pin of the connector labeled as CONTROL.

Note: The boxed processor’s TMA 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 TMA 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 46 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 45. Boxed Processor TMA Power Cable Connector Description

BdP PCbl

Signal

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.

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Intel BX80569QX6850 Datasheet Page 116