![]() This means that you can lower the fan speed by reducing the voltage, though most fans will stall below a certain speed. ![]() The higher the voltage, the quicker the fan speed, and the greater the cooling. The most common voltage for DC fans is 12V, though they also come in 5V, 24V, and 48V. The signal pin collects information about how fast the fan is spinning (called tachometer output) and alerts if the fan stops working. They run on a fixed voltage from a DC power supply or via the motherboard and provide consistent cooling to your computer.ĭC fans have 3-pin connectors: A power supply pin, a ground pin, and a signal pin. What's a DC Fan?Ī DC fan is a traditional computer fan. These fans differ in crucial ways that change how you use them in a computer. Direct Current (DC) and Pulse Width Modulation (PWM) fans are the two main types found in computers.
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