Corsair Fan Running at 2300RPMs Constantly.

LightningsalesUK · Apr 14, 2017

I have an old system I have not used in a while with a corsair SP120 as the exhaust fan, however it is running at a constant 2100-2300 RPMs. Fan controllers do not change a thing, Is the motor controller broken?

Paperdoc · Apr 14, 2017

I'm pretty sure the Corsair SP120 is a 3-pin fan. The speed of such fans can be controlled only by a mobo header that uses Voltage Control Mode. IF it is plugged into a 4-pin fan header that uses PWM Mode for control, it will run at full speed all the time.

LightningsalesUK · Apr 15, 2017

Paperdoc :

I think the motor is broken, I tried all fan ports and in a different computer and 2300rpm constantly. I swapped the fans out for a couple of others I had and I am having no problem with them.

okcnaline · Apr 18, 2017

What's the temperature of the computer?

LightningsalesUK · Apr 18, 2017

okcnaline :

It is a modified CPU so I am not sure it is 100% correct however it says around 55-65c while idle and 70C under load, It has a big cooler on though,I think the temps are wrong.

okcnaline · Apr 19, 2017

Is the fan plugged into the motherboard or a controller?

LightningsalesUK · Apr 19, 2017

okcnaline :

It has been in the motherboard only, I have tried it on other computer as well.

okcnaline · Apr 19, 2017

Check the fan profiles in the BIOS. Can you tell us the settings?

LightningsalesUK · Apr 19, 2017

okcnaline :

They are all defaul. I have changed the fan out now.

okcnaline · Apr 19, 2017

I know; what temperature is it set to when the fans start?

LightningsalesUK · Apr 19, 2017

Is my CPU temp? like 20-40C in bois. The fan speed is set 50%

okcnaline · Apr 19, 2017

How aer the temperatures of the computer itself?

LightningsalesUK · Apr 19, 2017

okcnaline :

All normal, Nothing over the average. Good temps all round, When on, I think because of the 771 to 775 CPU mod the motherboard thinks that it is super hot.

okcnaline · Apr 19, 2017

Alright, change the BIOS settings for fan temperatures from 20-40°C to 50-70°C.

LightningsalesUK · Apr 20, 2017

okcnaline :

There is no option for that, that I can find.

okcnaline · Apr 20, 2017

Just to make sure, the fan is plugged into a header at the bottom of the motherboard, right? If it is, is it plugged in on the left 3 pins?

And for the system fans, make sure it's set to manual.

LightningsalesUK · Apr 21, 2017

okcnaline :

Fan Is plugged into a 3 Pin fan at the top of the board and and fan is set to manual with 50%

okcnaline · Apr 21, 2017

Try setting the fan percentage to 25%.

LightningsalesUK · Apr 21, 2017

okcnaline :

Set it to 20%, No difference.

okcnaline · Apr 21, 2017

Fan controller is shot then. Looks like you have to get new fans. Sorry for bothering you for so long!

LightningsalesUK · Apr 21, 2017

okcnaline :

Thanks for the help, I had a feeling the fan was shot, Its all good though, The fan is retired now.

Corsair Fan Running at 2300RPMs Constantly.

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