Tricks and tips for everyone


Do fan splitters work with PWM?

Do fan splitters work with PWM?

Gelid’s 1-to-4 PWM Fan Splitter allows the user to connect up to four PWM fans from just one PWM fan header on the motherboard.

Do fan splitters reduce fan speed?

No, they will all run the same speed.

Can I connect PWM fans together?

Connect two PWM fans to your mainboard’s CPU socket. Use multiple Y cables to connect a series of up to five PWM fans and provide as much extra cooling as desired. Power drawn into your CPU cooler is adjusted depending on its temperature.

Can you run a PWM fan with 2 wires?

A 2-wire fan is controlled by adjusting either the dc voltage or pulse width in low-frequency PWM. However, with only two wires, a tach signal is not readily available. This means that there is no indication as to how fast the fan is running—or indeed, if it is running at all. This form of speed control is open-loop.

Can I use a 4-pin splitter for 3 pin fans?

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.

Is it OK to use fan splitter?

They’re safe. The reason why the fan connects to the motherboard is so that the motherboard can tell the fan when to ramp up its speed (they don’t run at full blast unless they need to).

How many fan splitters can I use?

So there’s a “rule of thumb”: you can connect up to TWO fans (normal ones) to any mobo fan header, but NOT MORE. That is why a Y-splitter with only two outputs can work. Although you can buy splitters with more than two output connectors, DO NOT use them!

How many PWM fans can you have?

Example: If a fan has a current strength of 0.2 Ampere and the motherboard fan connector has 1 Ampere, up to 5 fans can be operated in series via PWM Sharing Technology. Four fans without PST technology can be connected in series via the PST Cable Rev. 2.

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