Properly cooling a computer can significantly improve its performance, especially during those times when the user uses it for a prolonged period and for intense activities. Since the process also properly cooled the PC components, you can also expect them to function for a longer time, so there’s no need to replace any part that soon.

​However, there are pre-fabricated computer systems that feature an insufficient case fan. The result is the potential breakdown of the central processing units, graphic cards, as well as other parts within just a short period. In this case, you need to look for the best computer case fans that you can use in keeping your PC cool and ensuring that it continues to function well.

Why Do you Need to Invest in the Best Computer Case Fans?

The best computer case fans are essential for your PC since electronic components produce excessive heat. If left unmanaged, it can increase the wear of the component, causing it to malfunction and show problems earlier than usual. In this case, you need the computer case fan to move the heat generated by your PC’s components when it’s operating.

​If you don’t properly remove heat or let it build up inside the case, it can damage them and cause serious problems. Here are just some of the many reasons why you need to invest on it:

  • PC upgrade
  • Plan to do some light overclocking
  • You wish to improve its performance.
  • You want to make your PC look great.
  • You want to increase the life span of your PC’s components.
  • Your computer tends to generate too much heat – causing it to overheat from time to time and underperform

Mentioned are just some of the major reasons. Probably the most important reason why you need to invest in the best computer case fans is to improve the performance of your PC and prevent its components from getting damaged too early.

Common Sizes of the Best Computer Case Fans

When choosing the best out of the many PC case fans in the market, it is crucial to consider some important factors. The first thing you have to do is to determine the specific fan you need and want. This is crucial in finding one, which really suits your preferences and needs.

One thing that you have to look into when searching for the best computer case fans is the size. They actually come in various sizes – usually around 25mm to 250mm. However, the most common ones that you can find in the market are 80mm, 120mm, 140mm and 200mm. You have to learn more about these sizes as your knowledge about them can help you find the right size that the case can efficiently support. You wouldn’t want to end up purchasing a fan, which does not fit the case.​

​If you’re still unsure about the size that your case is capable of supporting, then consult the manual. It will most likely show a diagram of the different fan mounts that your case can support. To give you more idea about the different sizes of computer case fans, here are some relevant information about them.

a) 80mm

Probably the most common out of the different sizes of PC case fans, you can expect the 80mm model to delight you because of its performance. However, because it is smallest among the most common sizes, you can expect it to produce only less air. It also produces more noise when in operation. The good news that it still works well considering its size and can deliver a high level of airflow.

​When searching for the best 80mm fan, a wise tip is to invest more on a model, which is more durable instead of checking additional accessories and quietness. The 80mm fan can already be expected to work well, especially if you’re just planning to run it at a slow speed. It’s also an ideal option for PCs that don’t get hot too frequently, or are usually switched off.

b) 120mm

In your search for the best computer case fans, you have to make sure that you also consider the 120mm model. In comparison to the 80mm model, the 120mm case fans can be expected to produce more air. It’s mainly because it is equipped with larger fan blades. Note, however, that it’s larger size also restricts the airflow.

​Aside from being larger, it also spins slower. It is capable of moving just the same volume of air moved by a small fan that requires a faster spin. Since the 120mm model spins slower, it can produce less operating noise, making it much more convenient to use.

c) 140mm

Working even more quietly than the 120mm model, 140mm computer case fans have also enjoyed a sudden rise in popularity recently. One of its best advantages is that it has larger blades than normal, so there is no need for the fan to spin too quickly just to deliver the same amount of airflow. The result is longer life and less noise.

​You will also find 140mm fans that feature mounting holes spaced just like the ones used in a 120mm computer case fan. This specifically means that if space permits, you have the chance to use the larger 140mm model, instead of the 120mm version. Aside from moving more air and operating more quietly, the 140mm model also usually features interchangeable rims.

d) 200mm

Probably the quietest among the different sizes of computer case fans, the 200mm model is a large fan, which is capable of pulling more air than its counterparts. However, it also requires and consumes higher amount of power to operate. Most of these models feature large blades designed to reduce noise when operating and improve airflow.

​You can also find aerodynamic fan blades on it that can help reduce turbulence. With its strong features and larger size, you can expect it to offer more cooling even if you set it at a lower speed than it smaller counterparts.

Most of these models also feature a 3-speed switch designed to help you get the right balance between maximum cooling and quiet performance. Since it does not exert too much effort when operating, it can also lengthen its life.​

The Roles Played by Each Computer Case Fan Size

The fan size is extremely important as it contributes a lot to the performance of your computer. As mentioned earlier, bigger fans can push more air. Fans also circulate an amount of air that is measured in CFM or cubic feet/minute. Bigger fans move higher amount of air while rotating at similar RPM.

​Computer fans also generate noise, usually measured in decibels. Smaller ones, contrary to what others believe, are not actually quieter. Rather, larger fans are the quieter options since they don’t require quick spinning to produce reasonable amount of airflow.

​To decide which among the fan sizes to buy, you have to check them based on a cooling point of view. In this case, it would be best to consider investing in the biggest fan then letting them run at the fastest speed possible. You may also make your choice based on the noise. The good news is that some of the 80mm and 120mm models in the market today actually produce manageable noise, so choosing any of them, especially if you’re on a budget shouldn’t be an issue.

​Now that you’re aware of the different sizes of computer case fans and their individual capabilities, it would be much easier for you to find the best one. Just make sure that you consult the manual before making your final purchase so you can pick one, which size is really appropriate for the case.

Other Tips and Considerations

Aside from the size, there are other tips, factors and considerations you have to keep in mind before making your choice. If you consider all these, your chances of getting the best computer case fans with high functionality will be higher.

1. Check the Power Connector

All cooling fans operate on 12-volts supplied either by an actual source of power or the motherboard. The majority of computer case fans today feature adapters, making it possible for you to pick any of the two. In most cases, fans that connect to the motherboard are tiny Molex connectors featuring 2 Pins.

​Those with 3 pins, on the other hand, are equipped with a tachometer signal, which lets the motherboard read the RPM. There are also fans with 4 Pin connectors. These usually have PWM signal designed to control speed.

​A wise tip is to go for those fans that have PWM signal. These are preferable because you are allowed to control the speed, which tends to greatly affect the noise produced. However, avoid buying a fan just because of the PWM signal. Note that you can also separately purchase speed controllers, so it is crucial to study all your options and find out how you can save.

2. Analyze the noise and air flow

Two of the most important factors that you have to keep in mind in your search for the best computer case fans are the noise and air flow. Ask yourself about the amount of air a fan can push, as well as the level of noise it can produce. As mentioned previously, you can measure the fan’s air flow in CFM. This actually refers to the amount of air it can fill up in one minute.

​A fan with a higher CFM is a good choice because it specifically means that it is capable of pushing the right amount of air. Aside from checking CFM, though, it is also necessary to check the RPM. This is short for revolutions per minute. This is a crucial factor because it also contributes to the performance of, as well as the noise produced by the fan.

​If possible, pick a fan, which rotates at a slower pace but still produces a significant amount of air. This can help cool your PC without exerting too much effort. In terms of noise, you need to look for one with the lowest decibel range. It’s also important for you to consider several factors that can affect the noise it produces. These include:

  • Blade design
  • Bearings used for the fans
  • Closeness of the blades to one another, or to the outer ring

3. Consider the speed control

In case you’re concerned about the noise produced by the fan, then it would be wise to think about investing in a speed controller. This specific tool makes it possible for you to regulate the fans’ RPM. If you can’t afford to spend more on speed control, then a more affordable alternative is to purchase a case that has a fan controller hub. This is usually enough to lessen the noise produced by the fan without hampering its performance.

4. Look for one, which can improve the aesthetic appeal of your PC

The good thing about the best computer case fans offered in the market at present is that these allow you to customize the way your PC system looks. Some models, for instance, have interchangeable colored rings, making it possible for you to coordinate the color with the memory, graphics card and motherboard.

​You also have the option of choosing colored LED fans. This makes it useful for you if you prefer to use a feature, which can light up your PC. Several fans are also available in various designs and are equipped with a few lighting features, making them more attractive.

​Make sure, however, that you check the other important features and specifications of the fan you’re planning to buy before checking out how it can aesthetically improve your PC. While LEDs are good to look at, for instance, you can’t expect them to help in eliminating the heat from your PC. Check the functionality and features of the fan first before thinking about how it will look.


Finding the best computer case fans can really contribute to improving the performance of your computer and increasing its lifespan. It prevents overheating by regulating temperature within the system. This makes it possible for the vital components of your computer to perform their functions in a much cooler environment. Just make sure that you pick one based on your system and your specific needs, so you will end up getting satisfied with your final purchase.