[SOLVED] Controlling 3-pin fan

[Torquel29]

Hey guys,i just finished a build.I have 2 case fans that are connected to my motherboard with 3-pin connection.While discovering the bios i saw that there is a section that i can control these fan's speed.It is of course not under PWN but DC.From my understanding this is a way to control 3-pin fans speed with the voltage u gave.Am i right? If so,they were getting 7.5 voltage and not 12 as far as i can see.So can i make them lets say get 10 voltage all the time so they can keep turning faster? Will making them always get 10 voltage be any harm.I have a 650w PSU for a ryzen 5 2600 and rx 580 so i think i have enough room for more voltage.

 

[laviniuc]

PWM vs. DC fans - which are generally better?

Greetings, I was using Vardar PWM fans till today, changed them for Aerocool Dead Silence. These are DC fans. They can be regulated pretty well. Are there any down sides and up sides of PWM vs. DC at all? [besides the digital/analogue aspect, and 3 vs 4 pin header]. Thank You! Regards uplink

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[Grobe]

It's save to make the fans run with lower voltage than spec.

 

[Torquel29]

It's save to make the fans run with lower voltage than spec.

Fans are 12V right? So running them 9-10 should be safe?

 

[TJ Hooker]

Yes, it's safe, they were designed to operate at variable speed depending on what voltage is applied. 7.5V is fine, 10V is fine, as is pretty much anything else. The only thing is that there will be some minimum voltage required for them to start spinning.

If you want them to spin faster then go for it. You should also be able to set a fan profile such that their speed will automatically vary based on what temperature your motherboard is reading.