"This is actually the second order from laptop frog I placed for this fan. So it starts off, my laptop eventually starts sounding like a jet engine. Not because of the fan speed, but because of how broken the fan was. Initially, I thought only one of the fans was going out because PredatorSense consistently showed one at max speed (6122 rpm). So I placed an order for this fan and some thermal paste, Arctic MX-4. The swap went perfect. The computer noise went down, cooling temps were in the 70s while gaming. I should have been prepared for what happened next.
Almost 2 weeks go by, and the jet engine noise is back again. This time, PredatorSense is showing the other fan slow and stuttering, and the new replaced fan at max RPM. I'm so mad I didn't just replace them both while I had it apart. To finish my review, I recommend replacing both fans if you are going to be getting in there to replace one. The whole project each time took me about 25-30 mins, just because I was being really cautious.
Lastly, don't be cheap. Do not try and swap the fan without taking off the heatsink, cleaning the old thermal paste, and applying new. Chances are you won't be able to get the fan out without unsetting the heat sink anyways.
Hope this helps."