The motherboard fan

I swapped the motherboard for a Corsair SP120 fan in my office of CQ5300UK. It is a connector 3 pin identical to the oringinal, but I get an error of fan on the system startup. Why is this?

The speed of the fan sensor has a minimum rotation value. Installation of a 120mm fan that has a slower speed causes this problem. An example of this can be found here:

http://h30434.www3.HP.com/T5/desktop-hardware/system-fan-has-failed-error-after-case-swap/m-p/1404443#M46796

Tags: HP Desktops

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