CPU fan showing up 40-50k RPM in Bios?

[kingsofadam]

I turnt my pc on when i got home from work today , got CPU Fan Error.
Ok it runs into windows fine. Fan seems to be spinning fine.

Had a look in speedfan and it says the cpu fan is 0 RPM
had a look in my bios and its showing up around 40-50k RPM.

Any ideas?

Im guessing its a mobo fault?

Kind Regards
Adam

 

[paradigm]

Have you tried plugging any old fan into the CPU fan header to see if that reports a decent RPM?

 

[kingsofadam]

I havnt Quite yet , will do when i get some time.

 

[Vertiginous]

its showing up around 40-50k RPM.





Kind Regards
Adam

ha, at that speed it could start flying

 

[kingsofadam]

this may be really stupid but when i got in my room was freezing , could it being very cold cause any issues like this?

 

[Suarez7]

If your fan was spinning that fast you wouldn't be able to sit in the same room.

 

[RJC]

I have had issues in the past where the fan speeds is low and the sensor picks up at stupid speeds, ie 50000 rpm!

 

[kingsofadam]

So RJF do you think its because it was very cold?

 

[biuro74]

It's probably an issue with unsigned and signed integer value representation in BIOS, no big deal, but it's definately to be ammended by BIOS programmers.

I suffer the same BTW

 

[NirK]

this may be really stupid but when i got in my room was freezing , could it being very cold cause any issues like this?

Maybe it is really cold because the fan is spinning at 50k RPM. That is some pretty serious cooling power.

 

[Something Else]

bet overclock it quick when it can cool the sun! but yea it may have come loose or just doesnt work at a certain temp

computers read fans funny when they aint spinning when they should be, its like they assume its created a black hole and is spinning at 50k rpm