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Amazon.com: Bewinner 4-Pin PWM Fan Hub, 4-pin Male for CPU Fan PC Fans Hub, Computer CPU/Case Fan Power Multi Splitter Connector Cable Adapter for 12V Computer 3-pin 4-pin Fans : Electronics
![pins - Is the PWM rail of a 4pin pwm Computer fan Positive or negative - Electrical Engineering Stack Exchange pins - Is the PWM rail of a 4pin pwm Computer fan Positive or negative - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/5ipAk.png)
pins - Is the PWM rail of a 4pin pwm Computer fan Positive or negative - Electrical Engineering Stack Exchange
![RIITOP 4 Pin PWM Fan RGB Splitter Controller Hub 1 to 10 Ports for CPU Fan, Case Chasis Cooling Fan, Power by IDE Molex Large 4pin - Newegg.com RIITOP 4 Pin PWM Fan RGB Splitter Controller Hub 1 to 10 Ports for CPU Fan, Case Chasis Cooling Fan, Power by IDE Molex Large 4pin - Newegg.com](https://c1.neweggimages.com/ProductImageCompressAll1280/A6V8_132095337836752365ev9pzGeqIH.jpg)
RIITOP 4 Pin PWM Fan RGB Splitter Controller Hub 1 to 10 Ports for CPU Fan, Case Chasis Cooling Fan, Power by IDE Molex Large 4pin - Newegg.com
![3-pin CPU fan always at 100% (due to PWM only mode), should I connect it to SYS_FAN (Voltage mode)? : r/buildapc 3-pin CPU fan always at 100% (due to PWM only mode), should I connect it to SYS_FAN (Voltage mode)? : r/buildapc](http://i.imgur.com/mVb4lTy.jpg)