Review on Cooler Master MasterFan MF140 Halo Duo-Ring ARGB Lighting Fan: 24 Independently LEDS, PWM Static Pressure Fan, Absorbing Pads – Ideal for Computer Cases & Liquid Radiators by Pedro Hague

Just after the first month after I installed the fan, a fan started making a very faint rattle that lasted a second and then disappeared and turned on the cycle. It wasn't too loud, not too frequent, and I figured I'd be rejected (and charged) if I took it for that. Now I have three months and the throbbing is constant. Sounds like a bad camp. From time to time the chassis shakes and vibrates (I would forget if he didn't just do it - not even daily). I twirled it around a bit while it was off to see if it made any noise and it does. One of the other two starts knocking very softly, but you don't realize that until you turn off the terrible one. The third fan is fine, but 1 out of 3 after 3 months is not a very good indicator. After 3-1/2 months I am about to replace the fan and the second shows the beginning of it. Questions.