Asrock Z370 Pro4 - Chassis Fan

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   3 Pin fans have the following layout
1. Ground
2. variable voltage up to 12 Volt
3. RPM sensor

4 pins fans have a different layout
1. Ground
2. Fixed 12Volt
3. RPM sensor
4. PWMJ steering, so the pulse frequency sets the fan speed.
A lot of 3 pin fans run at full speed because of the fixed 12 volt, when using a 4Pin header

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threadzipper1957 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 05 Mar 2022 Status: Offline Points: 9365	Post Options Post Reply Quote threadzipper1957 Report Post Thanks(0) Quote Reply Topic: Asrock Z370 Pro4 - Chassis Fan Posted: 21 Jun 2023 at 10:25pm
	3 Pin fans have the following layout 1. Ground 2. variable voltage up to 12 Volt 3. RPM sensor 4 pins fans have a different layout 1. Ground 2. Fixed 12Volt 3. RPM sensor 4. PWMJ steering, so the pulse frequency sets the fan speed. A lot of 3 pin fans run at full speed because of the fixed 12 volt, when using a 4Pin header
	Kind Regards

mateuszsokol Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Dec 2022 Status: Offline Points: 20	Post Options Post Reply Quote mateuszsokol Report Post Thanks(0) Quote Reply Posted: 24 Dec 2022 at 5:02am
	Hi everyone, I have some questions about the Chassis Fan connectors on my motherboard. If I connect a 3 pin fan to one of these connectors, will I be able to control its speed in the bios? Or maybe fan must be 4 pin? And the last question is can I connect the fan controller to chassis fan connector and control several fans?