Review on Value Pack ARCTIC P12 120mm Case Fans - Pressure-Optimized, Very Quiet Motor, 1800 RPM Fan Speed, Ideal for Computers - Black by Jay Hill

So Revain put all these fans together and I did NOT get what was listed. I ordered F12 Silent 5 pack and received P12 5 pack without PWM. P12's are good suction fans if you have resistance on both sides, but they can get a bit noisy at 1800rpm. If your motherboard can adjust RPM with both DC control and PWM, then you're fine. Otherwise, expect a louder experience. Normally I would give one star but they cost so well I don't think they deserve less than 5 stars.