How do you wire a 4 pin computer fan?

How do you wire a 4 pin computer fan?

Each of these wires serves a specific purpose. Note that Chassis and CPU fans may use either 3-pin or 4-pin power connectors….4-wire fans explained.

Why does my fan have 4 wires?

Fan Types. A 2-wire fan has power and ground terminals. A 3-wire fan has power, ground, and a tachometric (“tach”) output, which provides a signal with frequency proportional to speed. A 4-wire fan has power, ground, a tach output, and a PWM-drive input.

How does a 4 pin fan work?

The fan rotates according to the voltage supplied through the PWM control pin. A 4-pin PWM fan does more than the 3-pin’s power, ground, and signal connections to the motherboard—it also has a fourth wire that provides feedback from a built-in tachometer sensor to the motherboard.

How do you wire 4 wires to 2 wires?

The first option is to use the black wire of the 12-3 cable as the hot wire. Connect the black wires of both cables together, and connect the common white wires together. Cap the red wire and leave it untouched in the junction box. Place plastic twist caps on all splices.

Can you use a 4 pin fan on a 2 pin connector?

Yes, the fan will work, but the speed of the fan won’t be controlled by the motherboard because the voltage can’t be controlled via just the two pins.

Can you control 4 pin fan speed?

Thus, you CAN alter the speed of a 4-pin fan by changing the voltage supplied to its Pin #2. (Pin #1 is Ground.) The best way to do this is with a pre-engineered third-party fan speed controller because all the fancy design requirements have been done for you.

What is a 4 pin fan?

A four pin connector is a little different than the three pin connector since it has the extra (fourth) wire used for controlling and sending signals to the fan, which likely has a chip on it that tells it to slow down or speed up (in addition to the other wires the three pin connector has).

What is 4-wire cable used for?

Electrical junction box with multiple circuits. Connecting a 4-wire and a 3-wire circuit at a junction box is used to connect two 120-volt circuits to one 240-volt line. This configuration is used most often for large lighting arrays.

Why does 220V have 4 wires?

The reason this change was mandated by the National Electrical Code is that the 4-wire setup is inherently safer and better able to prevent electrical shock, which in the case of a 220/240-volt circuit can be fatal.

What is a 4 pin fan connector used for?

Motherboard CPU Fan 4 Pin header Connector. For some AMD cpu fans: Colors may change. Chassis and CPU fans may use either 3-pin or 4-pin power connectors. 3-pin connectors are usually used for the smaller chassis fans with lower power consumption. 4-pin connectors are usually used by CPU fans with higher power consumption.

What is the color of the PWM fan connector pinout?

Motherboard 4 pin CPU PWM fan connector pinout Pin Number Pin Name Description Wire color (usual) 1 GND Ground black 2 +12V Fan Power yellow 3 SIGNAL Fan RPM green 4 PWM Digital Control blue

What is a CPU fan 4 pin header?

Motherboard CPU Fan 4 Pin header Connector. Colors may change. Chassis and CPU fans may use either 3-pin or 4-pin power connectors. 3-pin connectors are usually used for the smaller chassis fans with lower power consumption. 4-pin connectors are usually used by CPU fans with higher power consumption.

What type of power connector do I need for a fan?

Chassis and CPU fans may use either 3-pin or 4-pin power connectors. 3-pin connectors are usually used for the smaller chassis fans with lower power consumption. 4-pin connectors are usually used by CPU fans with higher power consumption. Fans and on-board fan headers are backwards compatible.