Hey guys, where did you see the silent one? I have a 140 on the top part of the box at 1200 RPM and it sounds like a turbine with 54 db on the sound meter. A lot of money for nothing.

I bought 2 140mm and 2 120mm fans for a midi tower from the same company that I operate for several hours a day. They are extremely quiet fans, as the tower is literally next to me on the desk where I work and I barely notice it. I deliberately tried to run them at 100% speed, and they still weren't unbearable. Their construction is high-quality, their installation in the tower was very easy, and the red color looks beautiful.

Let me clarify that the fans are 4-pin! My motherboard only had 2 4-pin outputs, and I tried to operate the fans with the remaining 3-pin ones, but they ran at full speed and I had to get Y-cables.

It is absolutely worth the money, which is not at all small - especially if we assume that it needs 3 or 4.
From the moment you hold the package in your hands, you understand that it is a very high-quality fan, with tremendous performance at max.
In so many rotations, it couldn't be completely silent. However, someone would only use it in those rotations if they had a problem or low airflow. In any case, it is so efficient that it will cover you in any case. It is worth it if someone sees it as a long-term solution

I have installed 2 ML140 as intake fans and I can say that I am more than satisfied. Connected to a fan controller with maximum speed at 70% and their performance is excellent. Almost silent, with incredible airflow and quite intense lighting. Maximum motherboard temperature measured with HWiNFO ranges from 29-32 degrees idle to 43-45 degrees under load. The build quality is very good, it's not cheap plastic, they are worth their money and more. A big plus is that they don't have bearings and the rotation is magnetic. Noise will be heard at 100% speed, but it's reasonable due to the huge airflow. Also, a big plus is the 5-year warranty.

+Excellent product from Corsair. Excellent quality, without the slightest noise from the mechanical bearing (tick tick) as it is magnetic.
+Combination of high airflow and static pressure, allowing it to be placed in open areas of the case as well as areas with many obstacles (e.g. liquid cooling radiator, cables from poor cable management).
+On Asus Maximus Hero VIII motherboard, it is set at 4 intensity levels. At low-high speeds, it is silent, at top-maximum speeds, it is noisy, which is logical due to the huge airflow.

As for the deep red lighting, it is not faded at all. In case someone operates it with DC adjustment from the Bios, the intensity of the LED will be proportional to the operating speeds. As a PWM fan for the utilization of the 4-Pin, it must be properly adjusted from the bios, where it will then operate without fluctuations in the intensity of the lighting even when it is turned off.
(Owner of 2 Corsair ML140 Pro Led and 1 Corsair ML120 Pro Led)