It installations instructions goes on to say that if a PWM Header is not used to feed the Fan hub: - " Note: If the 4-Pin PWM cable of the hub is not connected to a PWM connector on the motherboard, but instead to a 4-Pin- or 3-Pin port that is voltage regulated, the additional SATA power connector cannot be used, or all fans will spin at full speed. Control input a pulse-width modulation (PWM) input signal, used when the cooling fan assembly has an internal motor driver circuit. Buy Corsair 3-Pin Computer Case Fans 12 V 120 mm Fan Diameter and get the. However, reading the Fan Hub instructions it seems to suggest that these 3 pin fans can be controlled under PWM, when connected to the hub, providing the hub picks up its signal from a PWM header and the hub can then powered by a SATA feed. CorsairFanWeek This item: Corsair ML140 140mm PWM Magnetic Levitation Fan. I have grasped that fans with 3 pin plugs are considered to be DC fans and as such would normally be controlled by voltage. My new case has 4 RGB fans, with 3 pin plugs and I have a PHANTEKS UNIVERSAL FAN CONTROLLER. On my MAG B550 Tomahawk MB I can only see one PWM header and it is marked up as "PUMP_FAN 1" My system is not fitted with AIO cooling, so as this header is currently not used, is it permissible to connect my fan hub to this header, to enable PWM control of my 3 pin fans? By omitting the SATA power connection to the power supply, the maximum load capacity of the PWM hub is limited to a total of 30 Watts!" It installations instructions goes on to say that if a PWM Header is not used to feed the Fan hub: - " Note: If the 4-Pin PWM cable of the hub is not connected to a PWM connector on the motherboard, but instead to a 4-Pin- or 3-Pin port that is voltage regulated, the additional SATA power connector cannot be used, or all fans will spin at full speed. However, reading the Fan Hub instructions it seems to suggest that these 3 pin fans can be controlled under PWM, when connected to the hub, providing the hub picks up its signal from a PWM header and the hub can then powered by a SATA feed. How would you recommend going about this? Lastly, for now at least, I've noticed that commercial fan controllers and hubs almost always include some hefty caps with the reasoning described as this would allow them to handle more watts per channel.My new case has 4 RGB fans, with 3 pin plugs and I have a PHANTEKS UNIVERSAL FAN CONTROLLER. You say it is high-side switched rather than low-side, so would it avoid the problems described by Xander? I would also like to expand it to handle more fans and be powered by molex in the way you mentioned earlier. Now, I am curious about your second circuit. Bios settings only apply until Windows starts. Both is software driven and work as normal. I have 1 pc that's Asus mobo, so I use Asus fanXpert to control the 3pin input led fans, and another pc that's msi mobo, so uses SpeedFan to control the 3pin front fans. First of all, I wonder if you could point me towards some kind of crash course in basic electronics so I can understand what I'm doing a little better? I do have some experience working with designing and building circuits, but the last time I did anything like this was about a decade ago, so I'm beyond rusty. Most 3pin/4pin headers will control either analog or pwm fans. I also only signed up because of this thread, I've been looking for something like this for a little while because PWM fan selection is a lot more limited than 3-pin, so it would be great to be able to control a 3-pin as easily as a PWM.
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