How to control case fan speed

[thenamesjamesmartisano]

I have two 120mm fans on one fan header using a y splitter on my motherboard, the header does not show/give option to change its speed in bios but it does show its rpm in bios? I want to control the fan speed to make my computer a bit more quiet.

My components:

• 
  Mother board- ASROCK B450M-HDV
  Fans- 2x 120mm Fractal define C mini pre installed case fans.
  Y splitter- 3pin y cables Noctua (na-syc2)
  Fan header- CHA_FAN2
  CPU- RYZEN 5 2600

 

[RARRAF]

Fan controller is the only real option I know of
https://www.ebay.co.uk/sch/i.html?_osacat=0&_odkw=fan+controller&_from=R40&_trksid=p2334524.m570.l1313.TR5.TRC2.A0.H0.Xpc+fan+controller.TRS0&_nkw=pc+fan+controller&_sacat=0

 

[cin19]

I have two 120mm fans on one fan header using a y splitter on my motherboard, the header does not show/give option to change its speed in bios but it does show its rpm in bios? I want to control the fan speed to make my computer a bit more quiet.

My components:

• 
  Mother board- ASROCK B450M-HDV
  Fans- 2x 120mm Fractal define C mini pre installed case fans.
  Y splitter- 3pin y cables Noctua (na-syc2)
  Fan header- CHA_FAN2
  CPU- RYZEN 5 2600

According to asrock site, your MB has other cha_fan header, which is 4-pin Chassis/Water Pump Fan Connector, with Smart Fan Speed control too. Even your Y splitter is 3-pin, I think it will work.

By the way, I don't know you pay attention to the Fan_header specification or not, for the one you used, it can only support up to 1Amp or 12W, and other one can support up to 2Amp (24W), that why I recommend you use the other one, in case two fans will overload the fan_header, also you can control the fans speed too, and usually two fans will not, only few fans can, if they are, they will kill the fan_header.

 

[thenamesjamesmartisano]

I have two 120mm fans on one fan header using a y splitter on my motherboard, the header does not show/give option to change its speed in bios but it does show its rpm in bios? I want to control the fan speed to make my computer a bit more quiet.

My components:

• 
  Mother board- ASROCK B450M-HDV
  Fans- 2x 120mm Fractal define C mini pre installed case fans.
  Y splitter- 3pin y cables Noctua (na-syc2)
  Fan header- CHA_FAN2
  CPU- RYZEN 5 2600

According to asrock site, your MB has other cha_fan header, which is 4-pin Chassis/Water Pump Fan Connector, with Smart Fan Speed control too. Even your Y splitter is 3-pin, I think it will work.

By the way, I don't know you pay attention to the Fan_header specification or not, for the one you used, it can only support up to 1Amp or 12W, and other one can support up to 2Amp (24W), that why I recommend you use the other one, in case two fans will overload the fan_header, also you can control the fans speed too, and usually two fans will not, only few fans can, if they are, they will kill the fan_header.

Thankyou so much! this is my first ever pc build and im still trying to get used to everything, and didnt realise i could use a 3pin on a 4pin. I have since took your advice and changed the settings to silence, and its much quieter now! really appreciated.