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2. Computer fan control - Wikipedia

   en.wikipedia.org/wiki/Computer_fan_control

   A PWM-capable fan is usually connected to a 4-pin connector (pinout: Ground, +12 V, sense, control). The sense pin is used to relay the rotation speed of the fan and the control pin is an open-drain or open-collector output, which requires a pull-up to 5 V or 3.3 V in the fan.

3. Computer fan - Wikipedia

   en.wikipedia.org/wiki/Computer_fan

   Computer fans commonly come in standard sizes, such as 92 mm, 120 mm (most common), 140 mm, and even 200–220 mm. Computer fans are powered and controlled using 3-pin or 4-pin fan connectors. Usage of a cooling fan

4. Talk:Computer fan control - Wikipedia

   en.wikipedia.org/wiki/Talk:Computer_fan_control

   2 Fan Speed Controllers. 3 comments ... 5 How does software, which is digital, exert physical control? 1 comment ... 1 comment. 8 "This article principally describes ...

5. Pulse-width modulation - Wikipedia

   en.wikipedia.org/wiki/Pulse-width_modulation

   Variable-speed computer fan controllers usually use PWM, as it is far more efficient when compared to a potentiometer or rheostat. (Neither of the latter is practical to operate electronically; they would require a small drive motor.) Light dimmers for home use employ a specific type of PWM control.

6. Molex connector - Wikipedia

   en.wikipedia.org/wiki/Molex_connector

   In 20/24-pin configurations, the Mini-Fit Jr. connector (Molex Mini-fit Jr. 39-28-1203, [7] former 5566-20A or 39-28-1243, [8] former 5566-24A) may be used on ATX motherboards as the main power connector. The same style of connector, in single or paired 4-, 6-, or 8-pin configurations, may be used for additional CPU power and graphics card ...

7. Quiet PC - Wikipedia

   en.wikipedia.org/wiki/Quiet_PC

   With 3-pin fans, either fixed inline resistors or diodes, or commercial fan controllers, such as the Zalman Fanmate, can be used. Software like speedfan or Argus Monitor may allow fan speed control. Many newer motherboards support pulse-width modulation (PWM) control, allowing the fan speed to be set in the BIOS or with software.

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   mail.aol.com

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9. SpeedFan - Wikipedia

   en.wikipedia.org/wiki/SpeedFan

   SpeedFan is a system monitor for Microsoft Windows that can read temperatures, voltages and fan speeds of computer components. [3] It can change computer fan speeds depending on the temperature of various components. [1] [4] The program can display system variables as charts and as an indicator in the system tray.