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How to do your fan PWM settings properly.

Step 1: Identify your Fan Type by the Fan Connector

3-Pin fans are usually fixed-speed fans, they can however be voltage controlled when the motherboard allows it. Voltage control typically provides lower efficiency than the PWM control, minimum speeds are also not as low as with PWM control.

4-Pins fans can be speed regulated by PWM. This allows a finer control of the fan and allows to reach lower speed for silent operation.

3-Pin and 4-Pin are cross compatible but with some limitations as illustrated in below table.

Step 2: Insert the Fan Connectors into Motherboard

Plug different fans into the corresponding header. Such as, plug the CPU fan to the CPU_FAN header, plug the case fans to the chassis headers (SYS_FAN/ CHA_FAN)

CPU_OPT header is for second fan of you CPU cooler.

The names of the fan headers will be printed on the motherboard. (please refer to your motherboard manual).

Ensure the fan cable is fully inserted into the header.

If your motherboard doesn’t have enough fan headers, please try our PWM Sharing cable or PWM Fan Hub or PST fans

Step 3: Set the Fan Curve.

Option 1: Fan setting in BIOS

  • Enter the BIOS
    • Turn off your PC
    • Hold F2 button
    • Press power button to enter BIOS

Please refer to this video if you cannot press F2 to enter the BIOS.
Windows 10 How to enter BIOS configuration

  • Select Q-Fan control or press F6
  • The Q-Fan control allows you to set a fan profile or manually configure the operating speed of your CPU and chassis fans
  • Select the fan that you want to configure
  • Select DC or PWM control according to your fan type.
  • Click and drag the speed points to adjust the fan’s operating speed

Recommended fan curve:

For fans with 0dB function, set the minimum speed to 0% to enable 0dB mode.

  • Click Apply to save the changes then click Exit(ESC)
  • Press F10 to save settings and restart your PC

PS. Please refer to your motherboard user guide to get the accurate details. The pictures in this section are for reference only and may vary from the motherboard you purchased

Option 2: Set the Fan Curve by ASUS Fan Xpert

Please refer to this website to get the latest details Fan Xpert 4 - Introduction

PS. The software support may vary from the motherboard you have.

Install Fan Xpert

Set up your Fan Curve

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