How to add more fans than motherboard supports?

Quick Answer:

If you want to add more fans to your motherboard, you can either get a Y splitter, which lets you connect multiple fans to a single fan header, or a Fan Hub, which needs its own power supply. Be aware, though, that most headers can only supply a certain amount of power. Most fan headers have a rating of 1 amp. Read more here.

Add more fans to your motherboard

Headers for Fans:

There are three different kinds of Fan Headers on the motherboard:

  • CPU Fan Header: This is where you connect the CPU Fan.
  • System Fan Header: Connects PC/Case Fans
  • Power Fan Header: This is used to check on the Power Supply Unit’s Fan. For this header to work, your PSU must have a monitoring cable.

The System Fan Header is the ONLY type of header that is ideal for case fans, splitters, and PC fan hubs.


Fan Headers are, in a nutshell, the places on your motherboard where you can plug in your PC’s cooling fans. They work and let you keep an eye on how your PC’s fans are doing.


Can I add more fans to my PC?

With most computer cases today, adding more fans is easy enough for most people to do. Cases generally provide more than enough fan mount areas so you don’t have to worry about your computer overheating.

How many fans can you plug into Mobo?

Case fans can be connected to the two chassis fan headers and the PSU fan too if you want to. Each header can split and power at least two or three modern fans.

Can you put 3 pin fan 4 pin?

You can connect a 3 Pin Fan to a 3 Pin or 4 Pin header on the motherboard. The fan will function normally no matter what type of fan header is used.

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

Yes! PWM fans come with a 4-pin connectors for fully automatic speed control via your mainboard’s 4-pin PWM fan headers. Please note that 4-pin fans can also be connected to your mainboard’s 3-pin fan headers though.

Can you run 3 fans off header?

Almost all common normal fans today pull from 0.1 to 0.25 A max, so three fans can be done on one header. IF you plan more than that, you need to find out for sure the max current spec for them and add them up – do not exceed 1 A. The earliest fan type that had lights in them are called LED fans.

Can you connect fans to PSU?

Yep, you can use those 3-pin to Molex adapters to connect straight to the PSU. Another option would be a fan controller of your choosing, provides an aggregate point for your fans and only one molex connection to plug into your PSU.

How many fans should a PC have?

A gaming PC will need at least three case fans to properly regulate heat and keep the components cool. At the minimum, two case fans are needed for optimal cooling, and ideally three. An exhaust fan should be placed on the back panel, while an intake fan should be placed on the front panel.

Do motherboards come with fan splitters?

Champion. Your MoBo doesn’t come with any fan splitters included.

How many fans can my PC support?

Most motherboard will support up to three fans, maybe four. Depending on the CPU cooler, one or two fans may be used, the cooler fan(s) being the most critical.

How do you set up multiple case fans?

To install more fans simply connect the adapters to each other, regarding one of them should be linked to the PSU by the male end, and other should have a female end not hooked up to anything. Some fans have a Molex power input instead of a 3-pin one, so you don’t need any adapter to plug them to the PSU.

How do I add more fans to my CPU?

How do I add more fans to my CPU?

  1. Shut down your computer and disconnect its power cord from the wall.
  2. Open the computer’s main cover.
  3. Place the cooling fan in an appropriate location and secure it to the chassis by screwing in the four screws on each of its corners.
  4. Connect the fan’s power connector.
  5. Close your computer’s case and turn it back on.

Are all 4 pin fans PWM?

All 4 pin fan headers are NOT PWM. It has become common practice to use 4 pin headers these days, but Asus for example reports that their 4 pin headers for example are NOT PWM…..

Do 3-pin fans have speed?

When connected to 3-pin fan headers, the fan will run at full speed (unless the mainboard supports voltage based speed control).

Are 3-pin fans PWM?

These fans are also called 3-pin fans, as they come with 3 pins: a supply pin (usually 12 V DC), a ground pin, and a signal pin. PWM fans are DC fans with an extra wire for PWM. PWM fans are 4-pin fans, where the fourth wire sends a PWM signal to the fan motor. The PWM signal is the control input of the PWM fan.

Can you run a PWM fan without PWM?

If no PWM signal is present, almost all fans will work on 100% of power, while most pumps used in water cooling will operate at some medium speed. Meaning, if you want to run the pump on full power, you need to hook it up to a PWM signal that is set on 100% duty cycle.

What is the difference between a 3 pin and 4 pin fan?

The significant difference in practice is that 4-pin fans allow for RPM to change based on the need for cooling temperature, this reduces noise and power consumption. While 3-pin can control the voltage, but the voltage can’t turn to change the fan RPM at all and accurate as much as 4 pin fans.

Can you run 4 fans one header?

You can drive as many fans as you want on your motherboard fan header, AS LONG as you’re not drawing more amps then the header was intended to output.

Can you daisy chain case fans?

How To Daisychain & Install your PC Case Fans

How do I connect two CPU fans to my motherboard?

When using 2 fans, please connect one of the fans to the CPU-Fan header and the second fan to one of the Case-Fan headers of your mainboard. Alternatively, you can also use a 3-pin Y-cable in order to run both fans via the CPU-Fan header.

Should I connect case fans to motherboard or power supply?

Power fan is for your PSU. On some units the fan will be speed variable, this is where you plug it into your motherboard to control the speed. Go ahead and plug your fans into your motherboard, advice like that is what you see in youtube comments.

How do I connect 10 fans to my PC?

How To Install a Fan Hub + How To Install an Addressable RGB Hub

Should I install PSU fan up or down?

It is recommended to mount the power supply with its ventilation top cover facing DOWNWARD. The fan in the power supply will take in the warm air inside the computer case, and the power supply will exhaust the air through the back.

Is 4 fans enough for a gaming PC?

Conclusion. It is a good investment to add more than 2 case fans immediately when you are planning on gaming a lot and plan on upgrading consistently. This is so that you never forget that you need to upgrade by adding case fans to improve temperatures on higher performance GPUs and CPUs.

Andy Avery

I really enjoy helping people with their tech problems to make life easier, ​and that’s what I’ve been doing professionally for the past decade.

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