Summary: Bought 2 of these and one is very quiet and the other is loud as heck. Had to pull the bad one out of the case. Way too noisy. It makes me question the quality and how long the other one is going to last.
Pros: looks cool If you get a good one, they appear to be very quiet
Summary: The fan at max power is rather loud. Not like vacuum cleaner loud, but definitely louder than a laptop fan. This wouldn't be a problem if I could control one of the fans that I bought. One works perfectly. I can move the speed up or down whenever I want either from the BIOS or Speedfan software.
Pros: + Cheap + Beautiful LED's if you are into LED fans
Cons: - My only con is an uncertainty, so check out the other thoughts.
Pros: Depending the on speed your running them at, they can be whisper quiet or moderately loud. They do run smoothly and you can't beat the price.
Cons: Well I bought 4 roughly a week ago and 3 work great but the fourth one maked a rattling noise. Would like a replacement fan. I will keep the rating at four until after the customer service experience.
Pros: I purchased these for three reasons, the amazing reviews, the CFM, and they go with the color scheme I have. Combine these with a fan controller and these are BEAST. I am actually looking for a new case and, if I can, I plan to have a case that can house 1-3 more of these. Again they are amazing ...
Summary: and yes I even have the green modright fan silencers installed between the fan's and case.
Pros: good fans cheap moves plenty of air.
Cons: they rattle if they are upside down. I have 2 of these in my in-win ironclad case and they are upside down to pull air out of the top of the case, and they rattle when they are turned on and takes about 10 minutes for them to stop.