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CPU Fan

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by tech teacher

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I have a problem...I can not turn on my CPU Fan in the BIOS. It shows that my CPU temp is 145 F or 65 C...how can you turn on the fan? There is not an option in the BIOS to turn it on in there, it will not let me switch it around...says that it isdisabled. HELP!

13 replies

by gigelul

Hi,
Power off computer, open the case, power on and check if the CPU fan work. Change it or check if it is powered.

by maxwell edison

I've never seen a bios option to turn on/off the CPU fan. (Although that doesn’t mean it couldn’t exist.) I have seen, however, (albeit a rarity) reference to a motherboard jumper that enables/disables the CPU fan.

Make sure that the CPU fan is plugged into the CORRECT spot on the motherboard. There should be some printed reference on the motherboard to the CPU fan plug. Refer to your motherboard manual if it's not clear. Also, the motherboard manual should shed light on whether or not there is a jumper to enable/disable the CPU fan.

Make sure, however, that you have a good fan to begin with. I’ve seen scores of CPU fans freeze up and stop working. For 10 bucks (or less) you could get another fan.

by snis7

hi,
have you check to see if the fan wire(switch) is connected? try to unplug it and plug it in again and turn you pc back on. if it fails maybe you should replace it, its about $20 range maybe less.

by thechas

65?C is very high.

It does sound like your fan is either not working, or turning very slow.
At a minimum, you need to clean the fan.

The BIOS setting I believe you are referring to is FAN SPEED MONITORING.
You cannot enable the monitor if the fan does not have an RPM output, or is not spinning at the minimum speed that the motherboard manufacture set in the BIOS.

If the fan plugs onto a 4 pin drive connector, there is no way to monitor the fan speed.
The fan must have a 3 wire connector that plugs into a socket on the motherboard in order to monitor the fan speed.

Chas

by tech teacher

Thanks, but according to the board specks, 65C is very low to this. It could get hotter. After I posted this, I seen that in the manual.

by nair_paresh

Reseat The fan power cable on the mother board.
If it still does not work
go ahead and replace the fan only if it is not a to the processor
this is possible only for socketed Processors.
otherwise replace processor(Slotted)
or else one day it will burnout

by kankian2001

I think you must check if your motherboard can turn the fan. Then you can ask the customer support of the motherboard manufacture. Or you try to change the fan with another working fan.
Final task : Bring it back to where you buy that.

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