CPu fan can't be controlled

[syb.]

Hey all,

 

Relevant specs:

i7 4690

biostar hifi b85n 3d

XILence performance cooler: I250PWM

 

I'm new on this forum and created just an account because im stuck. My CPU fan started going crazy since yesterday. It goes on a fixed high speed not per se maximum speed when I start up my pc. Note in Bios the fan goes to a normal speed. Okey here short list of the thing I noticed and tried.

 

Reset Bios (cmos) nothing happens

Change fan mode in bios to manual etc. nothing happens

I noticed here that the measured fan spd doesnt match the actual fan spd so calibrating doesnt seem to help.

Used speedfan to try and alter the speed nothing changed. Did notice the fan isnt always on max spd but some fixed high spd.

Connected a case fan to the cpu fan output on the motherboard. This fan also goes on a fast fixed spd. So CPU cooler should not be the problem.

 

I'm willing to replace my motherboard but don't want to rush things.

 

Thanks in advice for your replies

 

[keskparane]

When did you introduce Speedfan into the equation. Was it after the problem and you're sure it's not setting the CPU fan speed?

[syb.]

Thanks for your reply. Yes after the problem. The problem started day after I added a 1060 to my rig, but not immediately so I don't think that's the problem. Can't think of anything that may have caused it.