Computer 3 Pin Fan Connector Pinout

But after attempting to use them they worked out pitifully.

Computer 3 pin fan connector pinout. Note that chassis and cpu fans may use either 3 pin or 4 pin power connectors. A pwm capable fan is usually connected to a 4 pin connector pinout. It will also have three square holes on the front and three wires entering the back. Chassis and cpu fans may use either 3 pin or 4 pin power connectors.

The 3 pin senses fan rpm revolutions per minute. While they look nice and do adapt 4 pin fans to 3 pin outlets esp. Connectors usually used for computer fans are the following. Ground 12 v sense control.

Fans with three pin connectors must be used on 3 pin cpu fan pinouts. A three pin connector is basically power 5 12 volt ground and signal. When no revolutions are sensed by the system an audio alarm or no system boot will occur warning the user or preventing proccessor overheating and burnout. 3 pin connectors are usually used for the smaller chassis fans with lower power consumption.

So these adapters arrived and were much needed. A 3 pin fan connector will be smaller in size than the 4 pin pwm fan connector. Three pin molex connector kk family this molex connector is used when connecting a fan to the motherboard or other circuit board. 3 pin connectors are usually used for the smaller chassis fans with lower power consumption while 4 pin connectors are usually used by cpu fans with higher power consumption.

2 pack sata to 3 pin 4 pin pmw 12v pc case fan power adapter cable 3 pin or 4 pin pwm connector to 15 pin sata computer cooler cooling fan power cable 4 0 out of 5 stars 24 7 59 7. 4 pin connectors are usually used by cpu fans with higher power consumption. 3 pin connectors are usually used for the smaller chassis fans with lower power consumption. Fans and on board fan headers are backwards compatible.

Typically the motherboard is required to pull the pin up through a resistor with the fan connecting it to ground once or more per revolution. On space constricted fan control hubs the 4 pin connector failed to lock onto the fan s wire leading to the adapter falling off the fan s wire lead. Chassis and cpu fans may use either 3 pin or 4 pin power connectors. The signal wire measures how fast the fan is moving without any controls for the fan s speed.

With this type fan speed is typically controlled by increasing or decreasing the voltage over the power wire. 4 pin connectors are usually used by cpu fans with higher power consumption.