Thermal Specifications; Boxed Processor Cooling Requirements; Baseboard Power Header Placement Relative To Processor Socket; Fan Heatsink Power And Signal Specifications - Intel BX80613I7980 Datasheet

Boxed Processor Specifications
Table 8-1.

Fan Heatsink Power and Signal Specifications

+12 V: 12 volt fan power supply
IC:
- Peak steady-state fan current draw
- Average steady-state fan current draw
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 8-6.

Baseboard Power Header Placement Relative to Processor Socket

8.4

Thermal Specifications

This section describes the cooling requirements of the fan heatsink solution used by the
boxed processor.
8.4.1

Boxed Processor Cooling Requirements

The boxed processor may be directly cooled with a fan heatsink. However, meeting the
processor's temperature specification is also a function of the thermal design of the
entire system, and ultimately the responsibility of the system integrator. The processor
temperature specification is found in
fan heatsink is able to keep the processor temperature within the specifications (see
Table 6-1) in chassis that provide good thermal management. For the boxed processor
fan heatsink to operate properly, it is critical that the airflow provided to the fan
heatsink is unimpeded. Airflow of the fan heatsink is into the center and out of the
sides of the fan heatsink. Airspace is required around the fan to ensure that the airflow
through the fan heatsink is not blocked. Blocking the airflow to the fan heatsink
reduces the cooling efficiency and decreases fan life.
illustrate an acceptable airspace clearance for the fan heatsink. The air temperature
entering the fan should be kept below 40 ºC. Again, meeting the processor's
temperature specification is the responsibility of the system integrator.
Datasheet, Volume 1
Description
B
C
Chapter 6
Min Typ Max
10.8 12 13.2
— — 3.0
— — 2.0
pulses per fan
— 2 —
21 25 28
R110
[4.33]
of this document. The boxed processor
Figure 8-7 and
Unit Notes
V -
A -
A
1
revolution
2, 3
kHz
Figure 8-8
99