be quiet!Silent Wings 4 120mm PWM high-speed fan, optimized fan blades, extraordinary high performance, extremely high air pressure, very silent operation, 6-pole fan motor, fluid-dynamic bearing

This fan has 3 levels. The highest level is too loud for me so I don't use it but the 2 fans still keep the temperature of my 10-core 3-4 GHz CPU under 60°C under full load. The non-pro version would have sufficed for me.

A fan on my PC started to click, so I knew I had to change it.After a bit of research I found that these were the best option, they may not be the cheapest, but they're well made and are super silent.They arrived quickly (as an aside - great packaging). They were really easy to install, just four screws and a plug and I can honestly say I should've bought them years ago. They're totally silent and they've made working next to a whirring pc a dream. I can actually concentrate !Couldn't be happier with the purchase, and although a bit more expensive, these will def last a long time.Highly recommended.

Was using standard 140mm's that came with case.. setting up a good fan curve and replacing with these resulted in a -8 -10 degree difference, very good.

High quality item - easy installation.

In PWM mode the fan motor produces a high pitch noise, at all fan speed settings, and throughout the rpm range. The noise disappears if the fan is used in DC mode, but then you cannot automatically control the temperature in the bios. This is a real shame as I really liked the other features, such as the properly decoupled mounts. As far as I can tell, there are two other fans out there that have properly decoupled mounts (one from cooler master and one from corsair). Noctua and others are still using the idiotic rubber “anti vibration” pads in the corners; these are completely useless when using screws to mount the fan ( because the screws are hard mounted to the fan so all the vibrations are then transferred to the case. Be Quiet please fix the issue with the motor noise in pwm mode.PS, I tried the fans in two different systems, one using the evga gold 650w on z590 motherboard and the other a corsair sf750 on b560e motherboard - same problem on both. Also my other pwm fans are working fine with no noise

I bought them with the idea of hooking them up to a corsair h150i cpu cooler , But unfortunately they are not as good as they seem . cpu temperatures are practically the same as if I had standard fans from corsair

I’ve had it with this company, it started with a power supply I had from them, a Dark Power 12 Platinum, noisiest power supply I’ve ever had!And now these, I thought I’d give them another chance, but I wish I hadn’t.Even at £5 a fan which I somehow got them for, they are absolutely horrible.By far the noisiest ‘silent’ fans I’ve ever had.I had 4 of these, and all 4 made really annoying grinding noises even at low RPM.They have “swappable corners” and “rubber fan mounts” to reduce noise and all this other pointless stuff that makes absolutely no difference, they are loud and a complete waste of money, do not buy them.Buy Noctua, Arctic or Razer instead.Avoid at all costs!

If you got this while it was still on sale, you got a banger of a deal. These fans run up to 3000 RPM and I can't hear them at all until around 1300RPM. On my AIO they keep my CPU at very low temps under load and I almost never hear them. They are made with beautiful craftsmanship out of Germany.

The temperature decreased by 14 degrees while using an RTX card at maximum capacity, which allowed the card to render 30% more frames per second (FPS).

"be quiet!" products are excellent, well designed and easy to love. Simple installation, built to last; if you want a fan that moves a lot of air yet is very quiet and reliable, look no further.

Great fan easy to install solid build quality

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