4 Pin Fan Connector
This is actually quite common. 3-pin fans will plug directly into a 4-pin motherboard header without any additional adapters.3-pin fans still have an RPM sensor on them, and most mainboards can still vary their speed based on temperature. 3-pin fans use simple voltage control for adjust the fan speed. 4-pin units instead use a pulse-width modulation (PWM) signal on the fourth pin to control the speed. The mainboard will usually auto-sense which type is connected and adapt accordingly.So which MB pins match to which fan holes?
4 Pin Fan Connector Pinout
This is actually quite common. 3-pin fans will plug directly into a 4-pin motherboard header without any additional adapters.3-pin fans still have an RPM sensor on them, and most mainboards can still vary their speed based on temperature. 3-pin fans use simple voltage control for adjust the fan speed. 4-pin units instead use a pulse-width modulation (PWM) signal on the fourth pin to control the speed. The mainboard will usually auto-sense which type is connected and adapt accordingly.So which MB pins match to which fan holes?The ones that fit are the ones that match. The connectors are notched such that a 4 pin header will take a 3 pin connector in the correct orientation and only in the correct orientation.
4 Pin Cooler Connector
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