CPU Fan Error! Help?

petemyster · 2 Jan 2009 at 12:33

so woke up this morning, all of a sudden, when booting up my PC goes to this new screen, showing the AMI symbol at the top, and it comes up "CPU Fan Error, press F1 to continue".

So I looked into this and people always said just disable the warning in the BIOS. But I want to know; whats wrong with the Fan (why is it suddenly playing up), how can I fix the problem with the Fan (not by disabling the error in the BIOS, i want the problem actually fixed), and is the fan still working as it should?

thanks in advance

Q6600 at stock
4870x2
4GB RAM
Z600 CPU fan
Asus P5Q delux

95thrifles · 2 Jan 2009 at 12:38

have you got the latest BIOS? I'd imagine if its a known fault they'd of fixed with a BIOS release, if you dont have latest try flashing your BIOS and see if that gets rid of it

UberGT · 2 Jan 2009 at 12:40

your the only person that can tell us if the fan is working, have a look inside the case if its not working youll get random restarts etc also try updating the bios or disabling the error.

petemyster · 2 Jan 2009 at 12:48

UberGT said:
your the only person that can tell us if the fan is working, have a look inside the case if its not working youll get random restarts etc also try updating the bios or disabling the error.

it seems working, temperatures are as they are always, but why would it say there is an error when I can see the fan is working (for the moment anyway

)

UberGT · 2 Jan 2009 at 12:50

loose cable? dodgy rpm sensor?

petemyster · 2 Jan 2009 at 12:53

UberGT said:
loose cable? dodgy rpm sensor?

unlikely, its been fine for months and i've only slightly moved the PC backwards and forwards, also the PC was built by a local technican, so I'd hope the fan was put in securely :confused:

Big.Wayne · 2 Jan 2009 at 13:02

Hey petemyster,

this is quite normal when using 3rd party heatsinks featuring 92mm/120mm fans while using BIOS controlled fan speed reduction.

The BIOS is tuned to flag a fan error if the rpms fall below a certain speed (800rpm approx). The problem is that the larger the fan the slower it normally spins and when using BIOS speed reduction the fans motor will not always reach the BIOS's target preset rpm.

If you leave the detection enabled you will find that sometimes it boots right up while other times the motor gets a bit lazy and the alarm is tripped.

The only thing you can do is:

Disable the RPM sensor in BIOS
or Disable Q-Fan
or Change to a smaller fan with naturally higher rpms

It's not a big problem so don't worry too much! :cool:

petemyster · 2 Jan 2009 at 13:09

Big.Wayne said:
Hey petemyster,

this is quite normal when using 3rd party heatsinks featuring 92mm/120mm fans while using BIOS controlled fan speed reduction.

The BIOS is tuned to flag a fan error if the rpms fall below a certain speed (800rpm approx). The problem is that the larger the fan the slower it normally spins and when using BIOS speed reduction the fans motor will not always reach the BIOS's target preset rpm.

If you leave the detection enabled you will find that sometimes it boots right up while other times the motor gets a bit lazy and the alarm is tripped.

The only thing you can do is:

Disable the RPM sensor in BIOS

or Disable Q-Fan

or Change to a smaller fan with naturally higher rpms

It's not a big problem so don't worry too much!

ok, thanks for the explanation.

thanks everyone