Pros: - For $20, the build quality and mounting options are great. - Very quiet at sub 1700 RPM while pushing great amount of air. - Can use screws (for rad) or push pins (for case). - The screw option even has dampeners on the mount. - Frame has rubber dampeners to avoid vibration noise. - No motor noise/whine/ticking. - PWM can drop down to 400rpm. - 900rpm-1500rpm is the performance-noise sweet spot. - Acceptable noise from 1800rpm-MAX. It’s more like air noise if anything. - Still great airflow (static pressure) even with a filter. - Focused airflow, doesn’t really “spread” the air, a little bit but no dead spot. - Long braided cables giving you options for places to mount. - push pin option comes with a "gasket" which makes it more quiet, can be used with screws.

Cons: More like "Meh" than Cons - Frame is a little “soft” compared to SW2 but then again no one really twists their fans. - The mounting corners require you to have like a bobby pin or precision eyeglass screwdriver to remove, tabs lock it in place. - Screw mounting is just straight shot, no open side, meaning the CPU mounting might be limited for some CPU cooler fan clips. See pics.

Overall Review: Thermalbench dot com has a more in depth info/review on this with both the PWM and DC version used on a rad. I used mine as 2x intake & 2x CPU cooler, total of 4 purchased. 3x are plugged in the corsair commander mini PWM and 1 is plugged in the CPU mobo PWM header (Asus z87 Maximus VI Formula). The cons I have are more of me nitpicking. The 2 as intake are right next to the GPU and RAM, I have a caselabs BH7 SFF ATX case and this just busts through the GPU and I can feel the air at the back side of the case. The other 2 are pushing down on my CPU cooler(NH-C14s) and keep my 4790k @ 4.8ghz 1.282v under 60 deg while gaming. SLI temps with my MSI 1080 gaming(not X or Z) are under control. Did a curve OC and have them running at 1.000v @ 1974mhz core 5557mhz memory. Idles at 37-39 for top, 35-37 for bottom card. Load is 72 for top card, 64 for bottom while playing modded witcher 3 and GTA V redux. Both games are @ 4k60 DSR. The 4 SW3 HS are set up at 500rpm (20%) @ 25 degrees then straight line to 2100-2200rpm (100%) @ 62 degrees. 2 of the front fans end up running at full speed while gaming and the other 2 are in between 1200-1800rpm depending on CPU temps. Even with all 4 running on those RPM, they are still acceptable and quiet enough even at night. I am happy with my purchase and this is recommended as CPU air cooler or case fan. Just 2c... I have the gt2150, Vardar 120er, and HAD the ml120 pro which I returned to get 2 more of this. I initially had 2 of each fans mentioned but I was optimizing my fan placements on my SFF case. If you already have gt2150, vardar 120er, or ML120, then no need to get this unless they broke. But if you are shopping around for fans, the High Speed version should be on your short list. For the price and the accessories or options it gives you, this is MY top choice for performance/noise/price combo. No fan is perfect but the overwhelming PROS of this certainly make this a 5 star fan.

Pros: They are quiet unless you crank up the RPMS. Look nice. Awesome packaging. Great hardware included.

Cons: I really wish they had some sort of airflow direction indicator. I put all mine in backwards because I'm terrible. Hint: they suck air in from the logo side.

Overall Review: They are great replacements in an antec 900.

Pros: Like the title says quality and performance, these fans exude just that. Just holding the box they are packaged in you know you are about to open a premium product. the fan and the mounts are in a separate boxes within the main box (boxception) and you get 2 mounting bracket options. The brackets slide and lock in place smoothly and firmly, they are such a nice fit that you would not think they are not part of the fan mold. The plastic they used does not feel like plastic, they have a more solid feel than any other fan I have which are (x2 Noctua NF-P14s redux-1500 PWM, x2 Fractal Design Dynamic GP14 140mm, x2 Corsair SP140L PWM fans) For those that care about sticker placement , these are ON POINT! You can stare at the center and there is no wiggle or travel of any kind, which also shows you how balanced the blades, motor, mounts and blade spacing are on this fan. Maximum performance minimum noise! Oh I almost forgot the cable is very VERY nice, the length is double the SP140L and the were wrapped in black braiding that matched my EVGA 850 G2. be quite! also wrapped the lip of both sides of the fan with a slim rubber rim for extra vibration cancellation, they also help create a better seal.

Cons: The fact I didn't buy 2 more to replace the Noctua NF-P14s redux-1500 PWM. The noctua fans are good fans, as everyone knows, and the NF-P14s redux-1500 PWM is very comparable fan but in my opinion and owning both I do prefer the be quiet silentwings 3. Watch the video below and see for yourself. I was lucky to find some with the exact fans I have. *Disclosure- I did not make the video this is what I found while searching for comparisons.* https://www.youtube.com/watch?v=knkD54Ulnow

Overall Review: After having my computer built for about a month the fact the case fan was white bothered me. I have the windowed Fractal design R5 and can see the fan from where I sit, it was the only thing that did not match (what could be seen through the window). So I researched some fans and came across these, these fan also reached a higher speed which I wanted more to be honest. I ended up purchasing 3 of these I also replaced the corsair fans that came with the h110i-GTX (instantly noticeably quieter!). With all of these running through a Corsair commander link mini I was able to sync the be quiets with the Noctuas (push/pull radiator config). With the rad fans running at 870rpm and the exhaust running at 1150rpm it is very quite and the cpu at moderate load is at 29'c, while under heavy load (not max load this is my personal machine I do not like to stress test) and all fans bumped up another 250rpm the cpu temp is around 46'c.

Pros: I replaced the fan in a low profile cpu cooler with this. It cools an I-9 9900k @ 139w 80c using cpu-z stress test for an hour in a cramped case. runs very quiet with normal usage, but the power is there when I need it. 28.6 db @ 2200 rpm. Silent at 1000rpm.

Cons: a bit expensive, but you get what you pay for.

Overall Review: This is my favorite fan. Pure performance.

Pros: If you run these fans at 7 volts, or at the lower case fan speeds, it is whisper quiet.

Cons: At 12 volts or higher than 40% speed, the amount of air they are move is pretty intense. It got louder than the cheaper fans I replaced. I just run them at 7 volts or less and they work as advertised. One of the fans I received was faulty, and was making a high pitched whirring noise. I replaced it with an additional BeQuiet fan and its fine now (only $20 so no big deal). Didn't lose any eggs over it, as factory defects are bound to happen sometimes.

Overall Review: Just FYI, sucks in air from the logo side; it can be hard to spot the air flow indicator. I used metal shears to remove the protective metal grating on the front fan mounts of my computer case so that airflow was even less audible.

Pros: Very Quiet, even on max speed!

Cons: - It's easy to over screw into the rubber housings, and since the screw radius is a bit small on the top they can screw too far in and it seems to affect the fans negatively, i.e. I was hearing a loud clicking noise (although this could have been some other issue such as a wire hitting the fans, really not sure). After I unscrewed and lightly screw()ed them back in to firmly press against the radiator (so that it wouldn't move when lightly jostled) they work perfectly! -Could use more instructions, came with two types of options and didn't even mention the 2nd ones.

Pros: - I don't ever hear it - It's been 33 months since I installed 2 of them

Cons: - only con is that more people don't buy these

Overall Review: - Highly recommend & worth every penny!!!

Pros: - High build quality, very balanced and cables are well made - Perform well and push a lot of air - Quiet when needed and when max'd out they are still reasonable considering the amount of air they're moving

Cons: - None so far

Overall Review: Typical high quality Be Quiet product. No issues or complaints. Would buy them again.