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Non PWM fans with PWN Hub

FeTix
By FeTix
in Cooling
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Is there any way i could change the speed of the sp120s if theyre plugged into a pwn fan hub? 

Preferably i would like it so when my cpu gets hotter and hotter all of the fans get faster as 2 will be on my radiator!

Anyone know what i can do? 

Motherbaord: Gigabyte Z170x Gaming 5

Fans: Corsair SP120 RGB

Fan hub: (The fan hub is of a NZXT Noctis 450)

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In theory the PWM hub should change the speed of the fans (3-pin fans don't constantly run at max), but there's no guarantee that the hub can adjust voltage to the fan (which is how you control 3-pin fan speed) like the motherboard fan header would. 

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  • Author

on the fan hub there is mostly 3 pins so i should be good right?

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thinwalrus my fans are not PWM but the hub is?

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Just now, FeTix said:

thinwalrus my fans are not PWM but the hub is?

Just connect them straight to motherboard if you want individual control for those two.

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if your hub supports voltage control instead of PWM you should be fine, if not - double check if you have set the actual pwm controler on the motherboard, connected to your hub is set to PWM and not to voltage. ( your hub needs pwm conection to the motherboard) - most hubs do support pwm and voltage (to the fans) - the connector to the motherboard must be set to pwm normally

Current Build

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1 hour ago, FeTix said:

thinwalrus my fans are not PWM but the hub is?

The hub you have is pwm in that it receives a pwm signal but doesn't send a pwm signal to the fans attached. It converts the incoming pwm signal into a corresponding dc signal which will work for controlling 2-3pin fans. If you want the fans to respond to cpu temps, plugging the hub into the cpu_fan or other header that supports pwm control and using the motherboard fan settings would work. 

 

A normal pwm fan would send a pwm signal which is a constant 12v signal and would mean 100% rpm for 2-3pin fans. 

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