Push a good amount of air & are silent, awesome fans at a great price.
341455
<div id="video-block-R2M3KSN43Y17ZR" class="a-section a-spacing-small a-spacing-top-mini video-block"></div><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/D1G0WUt1p8S.mp4" class="video-url"><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/91u1C-3uoOS.png" class="video-slate-img-url">&nbsp;&nbsp;They push good air and are very silent. They also have a nice LED light that is noticeable. Overall you cannot want anything more at this price. The cord was long enough to put them in the front, top or back and reach the Fan controller or motherboard easily. See the video and you can not hear anything on these fans. Corsair is really high quality, I am more than impressed by these at this price compared to other companies that charge more for the same or less quality fans.
3930921
Needed a second fan to push air through the radiator, and assist the pre-existing pull-fans.. These fans were uber easy to install. Spin quietly. Move just the right amount of air, and don't over-tax the electrical system.. Ran them through these relays: GENSSI Car 30A 12V SPST Micro Relay Kit For Electric Fan Fuel Pump Light Horn 4Pin (10 Pack) .. Together it's a match made in auto-heaven. Good buy all-around.
4412696
I own 4 of these fans and have zero complaints! Great fan at a great price! Moves a lot of air!
1071649
Nice fans. Extremely quiet. I have been using them for several months now and quietest fans I have ever used on a desktop. I use four of them, including 200mm on the front for intake. You can play with colors but I thats not big deal for me, I just left them as they are - blue. Overall, very satisfied with this product and recommend them to anyone who is looking for super quiet and efficient fans!
1506240
These fans move plenty of air through my radiator in push-pull configuration. Just as much as my obnoxiously loud, 100cfm/high static pressure/metal fan. The pwm function is a big plus as it throttles them only when needed. PWM should be a standard feature on all fans. These are somewhat loud fans at higher rpm's but at idle, they are completely inaudible, quieter than my stock intake case fan.
226410
Seriously the quietest fans that I've ever had. Excellent air movement and cooling capabilities. With 3 of these in my case (and a NH-D15) my PC never pushes 50C under load (not OC).
367131
Illumination is just right, not too bright but not dim either; never annoying, no need for an led controller.  THESE FANS REALLY ARE VERY QUIET.
And for only a few dollars difference from standard 3 pin case fans, I'd strongly recommend PWM's (4 pin) like these; let the motherboard do all the fan speed regulating for you (you can still adjust it manually if you want in your bios)

OVERALL GREAT PRODUCT, VERY SATISFIED
1598759
These are excellent fans.  They do a great job of cooling and are inexpensive to boot!
3985248
Great fans, junk switches.  We got a couple of upgraded switches and didn't bother with the ones that came with the unit, based on other reviews.  Super easy to set up & install.  Love the contemporary look.  They are quiet and move air well ... a huge improvement over the gaudy, outdated units we had before, and good value for infrequent use.
1146456
I really like these fans.  I put 2 of them in the front of my NZXT Phantom 630 and they look great.  They are moving a good amount of air and seem pretty quiet.  No complaints.
137622
Great fans! We also have the slightly smaller desktop Rowenta. These are great for powerful airflow, and much quieter than any fans we've ever owned. I would definitely recommend.
785915
These offer a good balance between sound and power. They are nice quiet fans with decent airflow for the price point. They were very easy to install and fit perfectly where I wanted them. I can barely hear them even with 6 fans(8 if you include the video card) going in my case. I have two Fractal Design fans (also extremely quiet fans btw) that came with my R4 Define case and three of these Cougars, two as front intake and the other as a top exhaust and they are barely audible unless I put my head right up to them. I have a small Vornado desk fan and it is about 10x as loud as these things. They do a good job keeping everything cool as well. I idle at about 39C and peak at about 55C-58C with while gaming - depending on the game. It's nice that it has a 4 pin power connector to let the motherboard control speeds as it goes or you can do it yourself with a fan controller. And I actually like the orange. It kind of compliments my Sabertooth board and EVO heatsink. They came with the mounting screws and extra  power adapters to allow them to fit all types of power connectors usually found in standard PSUs.
4481905
Great fans. Not too loud and really move the hot air out of my case considering their size.
2926118
Terrific fans. Blow a ton of air even with constrained air paths.  Lots of accessories included (shock mounts, etc.) A Super deal
945317
Work well, not much to say other than I had rattling and after adding this the fans are a LOT quieter.

I don't know why more PC manufacturers don't include these from the get go, the silence is fantastic.
3266019
Great fans - moves a lot of air - very quite for the amount of air that is moved - have used Arctic F12 PWM fans for years in many builds and they have always given great service - has 6 year warranty - will continue to use these fans - will purchase more in near future - great service and fast shipping from seller - 5 Star seller!!
1565042
these fans move more air than any other i have used and more quietly at that.  i have switched all my fans to these and haven't been disappointed yet.  i have tried MANY fans and these outpace all.