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How many fans can a fan header support?

Author

Penelope Carter

Updated on March 02, 2026

How many fans can a fan header support?

4 fans

Considering this, can you split fan header?

Yes, you can. 3-pin fans are 100% compatible with 4-pin headers, and generally speaking the 4-pin header is keyed so as not to damage the motherboard or fan if a 3-pin fan is incorrectly connected.

Furthermore, does it matter which fan header I use? The only one that makes a difference is the cpu fan. Make sure that one is plugged into the "cpu fan" header on the m/b. Other than that, the header used makes no difference.

Secondly, how many fan splitters can I use?

TWO fans

Can I connect fan to CPU fan header?

Yes, you can connect case fans to CPU_fan headers. Or you can use fan splitters to connect two case fans to a single chassis_fan header.

How many fans can I daisy chain?

This information can be looked up on the motherboard manufacturer's site (or should be in the manual, too). Typically, this is 1 A. Since the F12 PWM PST fans draw 0.24 A maximum, you would not want to chain more than 4 fans from a single header.

Can you connect a fan splitter to another splitter?

If you are referring to a two-way splitter plugged into another two-way splitter, then yes, it is possible. It just depends on the wattage of your headers and your fans.

How do I connect extra fans to my motherboard?

First, if you know the power ratings of your fans and of your motherboard, you may be able to use a splitter such as the Rosewill Case Fan PWM Cable Splitter . Such a splitter connects two or more fans to a single fan header on the motherboard.

Does fan splitter reduce speed?

splitter do not reduce power it only split between the 2 fan and they receive ful power but it will only read one speed sensor for one fan .

Are fan splitters bad?

They're safe. With a fan splitter, the motherboard can still direct the fans to speed up when needed, but it's going to direct both of them at once.

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

Apparently a 3-pin fan can plug directly into a 4-pin 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.

Do motherboards come with fan splitters?

You will need to get a 3rd party splitter for you mobo. No it does not. It does not come with a splitter. One plug is a 3 pin that connects to your motherboard fan headers for power.

Do RGB fans have 2 cables?

Each RGB fan is equipped with 2 cables. One cable is 3 pins and has to be connected to the head of the motherboard fan.

Are fan hubs good?

Yes, Hubs are safe, and Silverstone is a reputable maker. The key characteristic of a HUB like that is that it gets all of the power for its fans directly from the PSU, and thus avoids the limit on amperage available at a mobo fan header. It still gets the control signals from the mobo, though.

Can you daisy chain fan splitters?

if each fan is 0.2A or lower, it's fine. if not, you could risk it, and overdraw the header a bit in some situations, or get a powered fan splitter, or connect it to a different header. also, some motherboards have a high-amp header, so with those, you could daisy chain as many fans as could fit in the case.

Is Cha fan the same as SYS fan?

Chassic fan is usually the one you put on the case. System fan is usually the one that sits on top of your cpu cooling a heatsink.

Can I plug a case fan into m 2 fan?

2 header is a 4 pin, so it should work fine to put a 3pin fan in there, but would it run fixed rpm's according to m.

What is the difference between CPU fan and system fan?

The difference between the CPU fan and the system fan is that the former is the one attached to the heatsink of the processor, and the latter is generally on one of the sides of the case to exhaust hot air. Even though the BIOS isn't detecting a system fan doesn't mean there isn't one.

What is the pump fan header for?

PUMP_FAN1 is for the pump. CPU_FAN1 is for the CPU fans which are PWM controlled, depending on the temps the RPM will adjust accordingly. SYS_FAN1~4 is for case fans. Most people don't plug the pump into CPU_FAN1 because if it fails the mobo will detect it and refuse to boot or throw up an error code upon post.

What does cha fan mean?

CPU fans are regulated by the heat of the CPU… Cpu fan is exactly what it says it is,the fan header for the cpu,under air cooling. Sys fan means system fan,which indicates the fan screwed to the chassis,bringing air in/out of the vents on the case.

What does CHA_Fan mean?

What Is CHA_Fan. this refers to the fan plug/socket on your motherboard and it's to plug a Chassis/case fan if you like.

Where do I plug in a second CPU fan?

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. Such cables are available in specialised retail stores.

Should Case fans Be PWM?

To attain maximum cooling-per-dB, you need to have your case fans match the needs of your CPU/GPU/radiator/whatever fans, and since those needs vary, so should your case fans' speed. But FYI, you don't need a PWM fan for speed control.

What does ext fan mean?

extension

What is a motherboard fan header?

a fan header is the 3 or 4-pin socket on the mobo that supplies power to a fan. Some additionally can read the fan rpm (if signalled) & also have the voltage on them varied hence control fan speed. It is possible to power fans directly from the PSU or via a fan controller though so it isn't necessarily a drawback.

What is PWM fan?

PWM stands for pulse width modulation. PWM fans and/or pumps are found in some CPU coolers and GPU (aka graphics card) coolers. They use an integrated circuit to control the speed of a fan or pump and, therefore, how much cooling it's providing to the CPU or GPU. Note, older fans may use 3-pin connectors.

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