3pin fan pwm on 4 pin deepcool fh10

[Fares zaghloul]

i recently bought some be quiet! fans but i didnt realize they are 3 pin now and im stuck with them being on 100% all the time and its very loud i have a deepcool fh10 fan hub if i plug in a 4 pin pwm fan in the master slot will the behave and have the same speed as the 4pin fan?

[Agall]

3 minutes ago, Fares zaghloul said:

i recently bought some be quiet! fans but i didnt realize they are 3 pin now and im stuck with them being on 100% all the time and its very loud i have a deepcool fh10 fan hub if i plug in a 4 pin pwm fan in the master slot will the behave and have the same speed as the 4pin fan?

You can usually change a fan header from PWM to DC controlled in the UEFI/BIOS. Routing them through a hub would either require individual DC control of each header, or setting the whole thing to DC if possible.

 

PWM fans work by modulating the full 12V signal intermittently, enough to keep the fan spinning at a given RPM measured by the sense pin. DC fans simply lower the voltage to accomplish the same task which can be done on PWM or DC fans. 

[thrasher_565]

some hubs can make 3 pin work as the 4 pin pwm but some cant. web site says nothing about this. i mean you could just ask deepcool.

[Fares zaghloul]

6 hours ago, Agall said:

You can usually change a fan header from PWM to DC controlled in the UEFI/BIOS. Routing them through a hub would either require individual DC control of each header, or setting the whole thing to DC if possible.

 

PWM fans work by modulating the full 12V signal intermittently, enough to keep the fan spinning at a given RPM measured by the sense pin. DC fans simply lower the voltage to accomplish the same task which can be done on PWM or DC fans. 

I have a Asus prime b760m I tried switching to dc mode but it still didn’t let change any of the fan speeds

[Fares zaghloul]

6 hours ago, thrasher_565 said:

some hubs can make 3 pin work as the 4 pin pwm but some cant. web site says nothing about this. i mean you could just ask deepcool.

What are hubs that can? 

[thrasher_565]

2 minutes ago, Fares zaghloul said:

What are hubs that can? 

i use this.

this also converts the fan to pwm.

Edited November 7, 2023 by thrasher_565

[Agall]

9 hours ago, Fares zaghloul said:

I have a Asus prime b760m I tried switching to dc mode but it still didn’t let change any of the fan speeds

Then you'll likely have to directly wire those fans to the motherboard, without any sort of controller between them. You can usually split a header twice without issue, since you do need to be careful how many fans in total draw power from fan headers on a motherboard. You can find powered dumb splitters though that take a SATA/molex power connector and split one fan header into several.

 

A DC fan wired to the motherboard for voltage control with a header set properly to DC Mode and with a curve will not run at 100%. So if that's still the case, then there's something afoot in the configuration that we may need pictures to verify.

[alyen]

11 hours ago, Fares zaghloul said:

I have a Asus prime b760m I tried switching to dc mode but it still didn’t let change any of the fan speeds

Was there a option to set any fans to DC mode? CPU and chassis fans may have different option, but from my experience Asus mother boards seem to limit DC fans to aroundt 60% minumum speed for custom profiles. If you can change it to DC mode, you could try using Remoo Fan Control software to see if you bipass the mother minimum limits.