SILENT WINGS PRO 4 120mm PWM Photos and Features

SILENT WINGS PRO 4 120mm PWM Specifications

Mechanical specifications

Dimensions (L x W x H), (mm)

140 x 140 x 25

Bearing technology


Motor technology

6-pole fan motor

Weight incl. fixed cables (kg)


Push pin fixing


Screw fixing


Cables / Connectors

Y-cable for lighting signal`


Lighting connector




Cable length (mm)


Cable sleeve


Performance / Noise

Air Flow @ 100% PWM / 12V (CFM / m3/h)

83.9 / 142.5

Air Pressure @ 100% PWM / 12V (mm H2O)


Noise level @ 100% PWM / 12V (dB(A))


Lifespan (h / 25°C)


Electrical specifications

Rated Voltage DC (V)


Operating Voltage DC (V)

7 - 13.2

Current consumption (A)


Safety current (A)


Input power (W)


Rated Current LED (A)



3-pin to 4-pin 12V-connector


12V to 7V adapter


12V to 5V adapter




Push pins


hard plastic washer




Safety certification


CE / RoHs / RU / UKCA / TÜV / WEEE


Warranty (Years)



Be Quiet also sent over a bundle of four of their higher-end Silent Wings Pro 4 120 mm PWM fans. The packaging for this design is almost exactly the same as the standard Silent Wings 4 only with an updated picture on the front and the model name has Pro in it of course. I’m surprised that the high-end designation on the left doesn’t set the standard and pro models apart. That said they have the same black background with the only color being the orange in the be quiet logo up in the top right corner. I like that they have a picture of the fan shown and that the model name is in the biggest font and is easy to see in the white. The back has a specification listing but beyond that, they still aren’t using this space to show off any of the features.

image 23

image 24

When you open the box up they have all of that extra information that I had hoped to see on the back with pictures of each feature and descriptions to go with each picture all printed on the underside of the top. With so much information they could really use a front flap like how Noctua uses which could also give a window inside to see the fan itself. But with this setup, a window wouldn’t show anything because the fan has cardboard over it and the accessories are all in their own box.

image 25

image 26

For accessories, the Pro model comes with less than the regular model. You get a try with two different mount variations on it and then two small baggies. One has normal black mounting screws and the other has rubber washers and the pull-through mounts.

image 27

The SILENT WINGS PRO 4 120mm PWM cranks the fan blade density up with 9 blades in total from the 7 we saw on the Silent Wings 4 140 mm. They are closer together which combined with the 3000 RPM puts the fan at 83.9 CFM, more than 30 over the regular 140 mm. The center section has the dark grey sticker and the black be quiet logo printed on it which goes well with the blacked-out fan.

image 34

image 35

image 36

Like on the standard Silent Wings 4 the sides on the SILENT WINGS PRO 4 120mm PWM have the airflow direction arrow and the arrow showing the fan spinning direction on two of the sides and be quiet branding on the other two. The side profile looks like the Pro has a completely different housing but the base fan housing is the same but the third mounting option included with the SILENT WINGS PRO 4 120mm PWM fills in all of the gaps here making the side profile look much thicker. They are still removable with the same squeeze clips and you can switch back to the other two designs that come with it which are the plastic and rubber mounts found on the standard model. The preinstalled larger mounts are designed for radiators with its wider mounting pads.

image 30

image 31

image 32

image 33

The back view of the SILENT WINGS PRO 4 120mm PWM looks significantly different from the base Silent Wings 4. Namely in the shape of the housing around the fan blade here which is round in the center but moves into a more squared-off shape towards the back. This goes well with the pre-installed wider radiator mounts and helps especially with radiator airflow by spreading it out to get better coverage. The SILENT WINGS PRO 4 120mm PWM is radiator focused and you can especially see it when you start looking at its specifications. Where the base 140mm Silent Wings 4 has a static pressure of .95 mm the SILENT WINGS PRO 4 120mm PWM pushes the H2O 5.31 mm. It has the same 6 pole 3 phase motor and fluid dynamic bearings but can spin up to 3000 RPM. The center section which has the model information sticker in the center has similar mounting only this design has thicker mounts and they have a different angle as well to go with the higher CFM. Where the plug was on the 140 the Pro has a three-way switch where you can change the fan speed down from 3000 RPM on the “ultra high speed” mode. It also has a high-speed mode which would be the medium setting, and a medium speed setting which would be the lowest setting. For a lot of people, the features and fan speed of the SILENT WINGS PRO 4 120mm PWM may not be needed, but I love that you have the option to run this at different speeds with a switch. Obviously, radiator use is the target but with that option SFF builds would also be a good use, you can run at the lower speeds but have the option to turn things up if you need more cooling. Exactly what I used to do with 3000 RPM Noctua fans in some of our LAN builds.

image 37

image 38

While the cable on the Pro model is sleeved with black sleeving just like the regular Silent Wings 4 there is a clear difference in the sleeving which has a might tighter weave and is more flexible. Then the cable plug on the Pro drops the black heat shrink for a Be Quiet branded addition to the plug. This new end looks nicer but because it is longer you may have to work around it a little more when wiring and trying to hide your cables.

image 28

image 29

image 40

image 41


Log in to comment

We have 1119 guests and one member online