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Last response: in CPUs
June 25, 2013 7:25:56 PM

My motherboard is an ASUS Rampage III GENE

To cut the story short... I accidentally loaded the bios default settings and now for unknown reasons the bios is not recognizing the CPU fan. The fan is spinning but it is not being controlled by the settings of the bios ( the temperatures are OK but not low enough to play a game or to run a demanding program).

I really can't explain what's going on... I never touched the hardware ( I just loaded the default settings) 2 hours ago it was working perfectly. I have tried every setting combination (I have reinserted the battery too) and nothing.
a c 111 à CPUs
June 25, 2013 7:33:15 PM

What kind of temps are we talking?

Heatsinks with larger/slower fans tend to trigger this warning when q-fan is on. The fan should get faster as the system warms up.
June 25, 2013 7:38:41 PM

48C ( wich is not normal in my system). Immediately after running a game the temperatures jump to 70c. The fan is spinning but at the same speed... it is not reacting to the heat. All this, after loading the default bios settings... now I can't seem to figure out what happened.
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a c 111 à CPUs
June 25, 2013 7:50:58 PM

Can you go see if q-fan is on or not(in the bios)?

How fast is the fan spinning? slower than before(before the reset)?

Also if you happen to be overclocking. Ensure the board is not messing with the voltages.
June 25, 2013 8:04:29 PM

It is spinning a little slower ( the temperatures are higher than normal).

q-fan is activated.
a c 111 à CPUs
June 25, 2013 8:07:58 PM

Turn it off and see how if that helps.

Q-fans job is to slow down the fans to make things more quiet. It does this by allowing higher temperatures in the name of more quiet operation. You may also be able to set it to performance to allow it to speed the fans up a bit sooner giving you better idle noise levels.
June 25, 2013 8:29:59 PM

The temperatures are back to normal... but the CPU fan error continues. I can't remember how some of the settings were before the accidental reset. I seem to remember something like this when I first built her almost a year ago ( but I don't remember what I did)
a c 111 à CPUs
June 25, 2013 8:34:12 PM

How fast does the fan spin?

You most times can set a fan speed limit to trigger warnings. This means you can tell it to wait until the fan is even slower before telling you. Last option would be setting it to ignore. Not always recommended if you can just adjust the warning speed downward.

This setting tends to be in the hardware monitoring section of the bios.
June 25, 2013 8:56:29 PM

I don't know how fast it is spinning. The bios can't detect the speed( never had been able). Everything is at maximum but the warning continues ( the fan is spinning fast now)
a c 111 à CPUs
June 26, 2013 7:17:01 AM

If the bios does not see the speed, It is defective(or running on some kind of splitter/extension that does not bring the tach wire along for the ride. OR the board it self not being able to see the speeds).

As long as you know it is spinning, You can just set the bios to ignore it.

The board will ALWAYS warn if it can not see the fan spinning unless you tell it to ignore it.
June 26, 2013 11:36:35 AM

Well I think I will just ignore it. The temps are good ( in fact, colder than before now that everything is spinning fast all the time after deactivating the Q-fans). As for the Bios, had never been able to detect the speeds of the CPU FAN. Maybe I just did that when I build the system. ( That would explain why the problem of the CPU fan error appeared after doing the reset)
My cpu is a Intel Core i7 X 990.