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Three Wire and Four Wire Fan Connectors for Intel® Desktop Boards


Last Reviewed: 05-Apr-2017
Article ID: 000005560

Chassis and processor fans use either a three-wire or four-wire connector. The three-wire connectors are for small chassis fans with lower-power consumption. The four-wire connectors are for processor fans with higher power consumption.

The figures below show proper fan connector placement.

Three-wire fan connecting to a four-pin fan header

3-wire fan to 4-pin fan header

Fan header pinouts

Pin Three-wire fan support
1 Ground
2 +12 V
3 FAN_TACH
N/A N/A
 
Note When connecting a three-wire fan to a four-pin fan header, the fan is always on; there is no fan control.
 

Four-wire fan connecting to a four-pin fan header

4-wire fan to 4-pin header

Four-wire fan connecting to a three-pin fan header

4-wire fan to 3-pin header

Fan header pinouts

Pin Four-wire fan support
1 Ground
2 +12 V
3 FAN_TACH
4 FAN_CONTROL
 
Related topic
Find the specification for your board

This article applies to:

Intel® Desktop Board DQ33HS
Intel® Desktop Board D945GZCC2
Intel® Desktop Board CA810E
Intel® Desktop Board DQ963GS
Intel® Desktop Board D845PECE
Intel® Desktop Board D815EFV