Intel Xeon Processor with 800 MHz System Bus Thermal/Mechanical Design Guide

36 Intel® Xeon™ Processor with 800 MHz System Bus Thermal/Mechanical Design Guidelines
Thermal/Mechanical Reference Design
Figure 2-15. Fan Cable Connector Pin Out (3-Pin Active CEK Heatsink)
Table 2-19. Fan Cable Connector Pin Out (3-Pin Active CEK Heatsink)
Pin Number Signal Color
1 Ground: Black
2 Power: (+12 V) Yellow
3 Sense: 2 pulses per revolution Green
Figure 2-16. Fan Cable Connector Pin Out (4-Pin Active CEK Heatsink)
Table 2-20. Fan Cable Connector Pin Out (4-Pin Active CEK Heatsink)
Pin Number Signal Color
1 Ground: Black
2 Power: (+12 V) Yellow
3 Sense: 2 pulses per revolution Green
4 Control: 21 KHz-28 KHz Blue