Readers ask: How To Wire Computer Fans To Plug Into A Wall?

What are the 3 wires on a computer fan?

Fan Types. A 2-wire fan has power and ground terminals. A 3wire 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.

Where do I plug my PC fans into?

To connect your fans to your motherboard, you’ll need to look for the appropriate headers, such as CHA_FAN above (chassis fan) or SYS_FAN (system fan). AIO_PUMP headers are for watercoolers only. Step 4: Once you’ve finished securing your fans, it’s time to connect them to your motherboard.

What are the 4 wires on a computer fan?

Here, the fan speed is typically controlled by increasing or decreasing the voltage over the power wire, as in the case of a common 2-wire fan.



4wire fans explained.

PIN WIRE COLOR FUNCTION
1 Black GND (0V)
2 Yellow +12V
3 Green Sense/Tach
4 Blue Control/PWM

Is 2 fans enough for a gaming PC?

2 case fans (1 intake in front, 1 exhaust at the back) show biggest improvements to cpu and gpu thermals. It depends on the hardware and layout of the case, but in general a single intake fan is enough for a general-use computer. For a low-end gaming PC, 1/1 is fine, 2/1 or 3/1 for higher-power hardware.

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Should I connect case fans to motherboard or power supply?

Depends. If they’re smaller fans connect them to the fan headers on the Mobo. If they’re large fans, like 200mm, definitely connect them directly to the PSU via molex connectors. I’f you install a fan speed/temperature control system, you should connect them to that which in turn connects to the PSU’s Molex line(s).

Can I connect a 3 wire fan to a 4 wire connector?

Apparently a 3pin fan can plug directly into a 4pin socket. Two of the pins provide power to the fan, the 3rd provides an RPM pulse to the motherboard to read the speed. The 4th pin is for PWM speed control. If you plug a 4 pin fan into a 3 pin socket, the fan speed will be controlled by voltage and it’ll still work.

Can I control 3 pin fans?

The speed of BOTH 3pin and 4-pin fans can be controlled, but the method is different for the two types. For 3pin fans, the connections to it are Ground to Pin #1, +VDC (varying) to Pin #2, and Speed signal on Pin #3.

Can I connect a 4 wire fan to a 2 wire connector?

Don’t use that 4wire fan with your 2wire controller Don’t Cut the connector Bend Over You’re still not making sense.

Can I plug a 3 pin fan into a 4 pin?

You can plug a 3pin fan into a 4pin header just fine. Speed control options (RPM range) will vary between fans and motherboards on a 3pin connection, but the fan will spin. Allows you to control the speed of your fans and set the fan curve.

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How many fans should a PC have?

It is always our recommendation that you buy cases with a minimum of 3 fans (or at least slots for adding them yourself) for gaming systems, not counting the power supply, CPU, and GPU fans. I know we say this about a lot of things (especially power supplies), but you really don’t want to skimp on cooling.

How many amps does a computer fan draw?

PC fans operate from around 5v to 12v or more and draw 100-300mA amperes of current depending on the speed.

What voltage is a cpu fan?

The voltage a computer cooling fan receives is defined by the difference between the voltage wire (+12 V) and the ground wire (+0 V). By connecting one or both wires to a different voltage, the voltage the fan receives will be different from the default 12 V the fan was designed for.

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