[SOLVED] 3 pin into 4 pin pwm?

[bangalad_stan]

my motherboard (asrock 970 pro3.0 r2.0) has only 3 fan headers with speed control, of which 2 are cpu fan headers, and the only one that is not is a chassis fan 1 header. so, if i were to plug in a 4 pin case fan into cpu_fan 2 (which is a 3 pin with voltage control), and a 3 pin into the 4 pin cha_fan 1 header, would it work? would i be able to control those? also, how do i make a fan curve in speedfan? nothing works.

 

[CountMike]

my motherboard (asrock 970 pro3.0 r2.0) has only 3 fan headers with speed control, of which 2 are cpu fan headers, and the only one that is not is a chassis fan 1 header. so, if i were to plug in a 4 pin case fan into cpu_fan 2 (which is a 3 pin with voltage control), and a 3 pin into the 4 pin cha_fan 1 header, would it work? would i be able to control those? also, how do i make a fan curve in speedfan? nothing works.

Yes, as long as such headers are set to DC(voltage) control. In your case, fan connected to CPU_FAN2 is going to be controlled by CPU temperature.

 

[dorsai]

You may have to set a specific voltage...on a 12v fan you can manually set 6v or 7v to get a medium fan speed to balance noise and cooling...but it will work no problem.

 

[bangalad_stan]

Yes, as long as such headers are set to DC(voltage) control. In your case, fan connected to CPU_FAN2 is going to be controlled by CPU temperature.

Can I set the 4 pin CHA_FAN1 in DC mode? I've looked everywhere and I couldn't find an option for it, I've also taken a look at the official page for the motherboard and the manual.