The four wire connectors are for processor fans with higher power consumption.Ī three wire fan connecting to a four pin fan header: The three wire connectors are for small chassis fans with lower power consumption. With this type, fan speed is typically controlled by increasing or decreasing the voltage over the power wire.Ī four pin connector is a little different than the three pin connector since it has the extra (fourth) wire used for controlling and sending signals to the fan, which likely has a chip on it that tells it to slow down or speed up (in addition to the other wires the three pin connector has).Ĭhassis and processor fans use either a three wire or four wire connector.
The signal wire measures how fast the fan is moving without any controls for the fan’s speed. In this case, can each individual fan header be modified to use PWM and voltage? Or do all fan headers have to be all voltage or all pwm on the motherboard.SuperUser contributor Homey_D_Clown_IT has the answer for us:Ī three pin connector is basically power (5/12 volt), ground, and signal. Connect the 3x 140mm pwm fans to one fan header, and the 3x 140mm non-pwm fans to another header. If I buy 3x 140mm's but they are PWM, won't the 3x 140mm that are INCLUDED with the case spin at full? I don't think the fan hub above can control both nonpwm and pwm on the same hub.only the pwm then will be regulated and the nonpwm will run at full blast.Īm I thinking it right? So basically sounds like 2 options.īuy 3x 140mm non-pwm fans of the same model and run all 6 in the sata powered fan hub and hook up to one mobo fan header to control voltage.īuy 3x 140mm pwm fans and 2 Y splitters. Should the 3x 140mm's that I buy also be NON-PWM (3 pin)? In that case, I will have 6x 140mm 3 pin and in theory, if I plug those into the fan hub above and plug that into a motherboard header, the motherboard can adjust the speed based on internal temps right?
My question is, I want to have them all connected to this sata powered fan hub and have the mobo control the speed based on internal temps. I'm also looking to add an additional 3x 140mm fans. I'm looking to pick up the be quiet pure base 500dx which comes with 3x 140mm non-pwm fans. Trying to get some clarification and see if I can get some help.
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