PCRepair CPU Cooling Fan for HP Pavilion dv7-6000 dv6-6000 Series Laptop MF60120V1-C181-S9A SUNON DC5V 0.4A

Does it well fit with dv6-6122tx? and also, do i need thermal grease when i replace the fan?

Does this fan fit the HP dv6-6170se?

Does this work in place of HP part# 666391-001?

I've bought this fan a week ago, it's always working on 100% speed, its speed is not detected by system, did I make any mistake while installing it ?