4 main features of a good silent PC case fan


   Computers work in conditions of elevated temperatures very often. When you hear the PC noise growth this means in most cases an increase in the operating temperature. This phenomenon has a completely logical explanation – the temperature inside the computer case rises and to reduce it, the existing cooler fans in the case should work at higher a speed, which causes a rise in the noise background. This issue is especially acute in those PC owners who only have “regular” coolers. Let’s consider the possibilities and features of choosing a computer case cooling fan, which will help to improve all cooling system of PC.

Before proceeding to the review of the parameters of internal case coolers, we must take into account the fact that in the PC there are already such coolers: a CPU fan and a Power supply cooler. If you have a new and powerful discrete graphics card, then it also has a separate fan.

Why do you need a separate case fan?

First of all, it helps to organize the correct cooling of entire computer.

Fans on each separate device correspond only to the cooling of this device and hot air is diverted only from a separate element, but at the same time it nevertheless accumulates within the PC case.

The main task of a case fan is to remove such a hot air outside the PC (in this case, we are talking about coolers working on the hood).

By the way, a similar function for laptops can be performed with a special cooling pad.

When you need to buy an airflow cooling fan for the system case, look at the following specifications:

1. Diameter of the case fan (sizes).

The most popular models of case fans have 80 (8cm), 90-92 (9-9.2cm), 120 mm (12cm) or 140 mm (14 cm) diameter.

We will immediately say that a larger system fan for the computer (120 mm) will be more efficient and quieter than smaller.

A 140mm, 120 mm or 92mm case cooling fan can be the best variant to buy.

However, when choosing such a fan it is necessary to consider the possibility of its installation in the case. That is, you need to look at the case of your PC, find in it a place to install the fans (it’s mostly on the back and side panels) and just measure what the cooler will fit there.

Well, and if you do not want to mess with the ruler – just read the manual to your case, there should be indicated – what cooler fans can be installed on it.

Computer case cooling fan

2. Type of connection.

Most computer case fans are connected through the following types of connectors:

  • 4 pin. This is the most “cool” type of connection. A cooling fan connects to the 4 pin motherboard connector. A fan speed control can be provided depending on the temperature with this connection.
  • 3 pin. This type also connects to the 4 pin motherboard connector (though only 3 pin will be used). In this case, the connection can also be made by adjusting the rotational speed by changing the voltage at the outlet of the connection, but such regulation is in most cases purely symbolic.
  • Molex. Molex fans do not connect to the motherboard, but directly to the power supply and work without adjusting the rotational speed.

There are also models of case fans with a combined connection method, such as molex + 3 pin.

For a purchase, of course, it’s better to have a 4 pin fan, but if it’s so bad for money, then you can take propellers with other types of connectivity.

3. Fan frequency of rotation and noise.

A fan speed depends on the airflow strength that it can create and, accordingly, the cooling efficiency of the computer.

However, large indicators of the rotation speed lead to the fact that the cooler starts to make a lot of noise. Here you need to look for a reasonable ratio of the speed of rotation/noisiness to choose a silent fan, but with a high productivity.

Average speed indicator for fans with a diameter of 80 mm is 2000 – 2700 rpm, 90-92 mm – 1300-2500 rpm, 120 mm – 800 – 1600 rpm.

If the PC fan has higher rotation speeds than those written above, its noise will most likely not be comfortable.

A fan noise is measured in Decibels and its value for a really quiet fan should not exceed 30-35 dB for “small” fans and 20-25 dB for “large” pc fans.

4. Bearing type.

The type of a fan bearing depends on the lifetime of a device, as well as its noise level.

There are the following basic types of a cooler fan bearing for a computer case:

  • Sliding bearing. Cheapest type of bearings, characterized by relatively short work life and average volume.
  • Ball bearing. Such a fan has a considerably higher lifetime compared to sliding bearings, but also slightly higher noise characteristics.
  • Hydrodynamic (liquid) bearing. A liquid cooling fan bearing is the most durable, since their construction involves self-lubrication.

If we talk about how much a case cooler for a computer is, then you we need to focus on the price from $3 for the cheapest models and up to $25-30 for flagship propellers.

When choosing a computer case cooling fan you can pay attention to such manufacturers of fans as Cooler Master, Zalman, Xilence, from the more expensive – Noctua fans.

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