How to Install Or Replace Fans in PC for Better Airflow and Cooling?

Using PC fans to ensure that your PC receives enough cooling is a difficult but manageable procedure. The strategy of cramming as many fans into and onto the casing as possible to get “maximum power” is not ideal, yet it is necessary in certain cases. A compelling explanation requires for the configuration for installing or replacing a new fan.

On the other hand, PCs are complicated pieces of technology with many little components that must work together seamlessly to function properly. These fans are a crucial component of every PC since they aid in cold air circulation throughout its components. Installing or replace a new fan on your PC may assist decrease temperatures and even make your PC more silent if your PC is overheating or if you need to replace an existing fan.

5 Pre-requisites for Installing Fan in a PC Case

Furthermore, before installing a cooling fan, consider several aspects to ensure that your PC receives enough airflow. To avoid confusion about “how to install fans in PC,” we have broken down the essentials of installation processes for an air cooling fan installation for your PC.

Keep in mind the best fan setup for PC is not the mount and screwing of the fan but to consider all the factors that might have an indirect or direct effect on PC performance.

1) Ventilation and Fan case

CFM (cubic feet per minute) measures how much air a fan moves in a minute, and it is set up on every fan. The more air that a fan moves, the higher the CFM rating. For your PC to be effectively air-cooled, you must have appropriate CPU fan direction to push and draw air into and out of the PC case. Higher overall CFM and increased air movement through your PC are a result of adding extra case fans.

Just keep an ear out for excessive noise from fans, which may create quite a commotion. Use fewer or quieter fans to prevent overheating your computer and making it excessively noisy. As an additional feature for your case fans, multi-color lights that flash in rapid succession may be a lot of fun.

2) Appropriate Fan Positioning

Air moves in one direction via a fan, entering from one side and exiting from the other. It is convenient either as an intake or an exhaust fan by reversing the direction according to fan installation. Particular care must be taken in the arrangement of the fans, particularly if you are installing more fans to get optimum output. In most cases, the case fans in front of the PC case take towards the air, while the case fans in the back of the PC case exhaust air.

Since hot air rises, if the fan housing includes vents on the top, they should be used as exhaust fans instead of intake fans. Side-mounted fans should be utilized for intake, although they often do not have built-in air filters. Additionally, you may personalize the constructed filters to avoid dust concerns.

3) Dust Problem

Dust is a quiet assassin for any technical gadget, and it is extremely dangerous for the air conditioning fan of your computer. Make certain that your computer remains as dust-free as possible. If this were not the case, all of the airflow in the PC would be ineffective in cooling down PC components.

Make sure that the air entering the case first goes through a filter to limit the amount of dust. Many cases contain detachable filters that are easier to clean with a short rinse. Allowing filters to get filthy or coated with dust limits airflow and cooling power to a significant degree.

Aside from the fans and vents, the numerous tiny spaces in the chassis and surrounding sections are the other significant entry sites for pests and insects. Except for caulking or sealant in your fan casing, there is no way to regulate the airflow at these locations.

4) Air Pressure Direction

Air pressure optimization in a PC case is one of the most talked-about and contested subjects in the world of PC cooling. Depending on the model, the air pressure within a PC fan casing may be positive, neutral, or negative.

Air Pressure direction in case
  • Positive pressure: When the case fans push more air into the case than they pull out, the air pressure rises, resulting in positive pressure.
  • Neutral pressure: The air pressure inside the fan case equals the air pressure outside the fan case.
  • Negative pressure: Negative pressure occurs when more air is drawn out of the case than is pumped into it, resulting in a sealed vacuum in the case.

To determine the positive vs negative air pressure pc, sum the CFM of all the intake and exhaust fans and divide the total by the number of fans. When the intake CFM exceeds the exhaust CFM, it creates positive pressure. But when the exhaust CFM is greater than the intake CFM, negative pressure is present. Neutral refers to a situation where the CFMs of the intake and exhaust are equal.

The PC will have neutral air pressure in an ideal circumstance since it will house in a protective casing. As a bonus, there would be no dust dragged in. Negative pressure would indicate that the air draws into the case via all the microscopic openings that are not regulated. It would also indicate that the case may not have any filters installed.

The cooling efficiency will decrease as a result of this over time. Make an effort to maintain a small positive pressure while maintaining a slightly higher intake CFM than exhaust CFM. As a result, the air that enters your case passes through a filter before entering your case.

5) Power Connections

The majority of cooling fans are connected to a computer using a standard connection of some kind. Modern systems will often employ separate fan headers with three or four pins for each fan. Standard MOLEX 4-pin peripheral connections, on the other hand, are also used. Before purchasing your fan, double-check to see what sort of fan connection you’ll need.

Furthermore, the fan gets powered via the analog 3-pin and MOLEX connections, which allow it to spin. In addition, four-pin connections are controllable digitally, allowing the system to adjust fan speeds as needed dynamically. Many motherboards and specialized fan controllers come equipped with many 3-pin or 4-pin fan headers, often distributed across the board at various positions.

8 Installation Procedural Steps for PC Fan

To know about which way to install case fans. Follow these installation steps to properly install a new or an extra air cooling fan in your PC for maximum power and efficiency.

Step 1: Picking the Most Appropriate Fan for PC

Typical case fan sizes for pcs with traditional case fan mounts are 80mm, 120mm, 140mm, or 200mm. What counts most, though, is the consistency with which it gets applied. Before selecting fans and coolers, it is beneficial to decide on a cooling strategy compatible with the fan case and other PC components.

Picking the most appropriate Fan for PC

Furthermore, cooling fans are available in a surprising number of configurations. Make certain that they are the proper size to suit the screw mounts on your case. Though, Some additional issues need to take into account.

Dimensions of the Fan:

Larger fans can move the same amount of air as smaller fans, although their rotating is slower. However, larger case fans are quieter than smaller ones because the little electric motors in the fan mechanism do not have to spin as quickly. Thus, more desirable if the PC case can accommodate them.

The Fan’s Rotational Speed:

The maximum number of revolutions per minute for case fans is specified (RPM). Slower fans circulate more air but are quieter. The speed of the fans can be modified using an appropriate motherboard or fan controller. In addition, certain fans and casings come equipped with manual controls that allow for basic fan operation.

PC Fan Airflow Direction:

Case fans often come with two different kinds of fins. Static pressure is the goal of one fan, whereas airflow is the goal of the other fan. Static pressure fans suck or push air more forcefully than typical fans, making them ideal for areas with limited airflow. These come with a cooling water radiator or a huge CPU cooler with many fins depending on the model.

Additional Aesthetics:

Depending on the model, some case fans utilize the electricity from the fan motor to light LEDs. These look great, particularly when combined with a “tricked out” overall build like the one shown here. However, they make no discernible difference in terms of performance enhancement or detriment.

Step 2: Where to Install Fans in Case

It would be preferable to determine where you wanted to put the additional case fans before buying them. It is not the function of PC fans to blast air over your components to cool them. Furthermore, in certain situations, the bottom and top-mounted fans are available from the bottom to the top of your case, allowing you to customize your setup.

Where to Install Fans in Case

One or more front fans, also known as intake fans, are responsible for drawing in the comparatively cold air from the outside of your case through the front of your case and into your PC. Determine whether you need your fan to be an intake fan or an exhaust fan and where you require it to locate.

Step 3: How many Fans Should be Installed on a PC?

The third thing you need to ask yourself is how many case fans do I need for maximum efficiency of my PC. The precise number of fans you need to install in your PC and where they should need positioning depends on various variables, and there is no one-size-fits-all solution. PC airflow optimization may be a difficult task to master. A general recommendation is that a computer has at least two fans, one at the back and one at the front, to maximize efficiency.

For high-end setups with strong gaming CPUs and GPUs, three fans should be the absolute minimum. It is unlikely that anything more than 3 or 4 fans would provide minor, declining results.

Step 4: Fans Face Positioning

To ensure that you install a fan the proper way around, you should first determine which side of the fan blows/pump out air and which side draws/sucks in the air before beginning the installation. Installing a fan with the wrong case fan direction may cause airflow to mess up, leading to overheating and damaging the PC’s internal components.

A fan installed at the front of your case needs evaluation to see whether it is an intake fan or an exhaust fan. Giving you the ability to draw in fresh air from the outside and circulate it within your container. The incorrect case fan direction will result in the air getting drawn into the case from the back instead of the front, and air drawn from the case from the back will be expelled from the front. And it might be detrimental to the components of the computer.

If this is your first time, it may not be obvious because some fans have an arrow written on the top or sides to illustrate the direction the air will blow. Ideally, the arrow should point into the case when installing the front intake fans, and it should point out when attaching rear exhaust fans, as shown in the illustration. One or two arrows are sometimes present, indicating both the direction of the airflow and the direction the fan is physically spinning.

Some supporters, on the other hand, will not have any arrow signal. In this case, identify where the fan motor is oriented by looking at the spokes/grille on the parts that hold it to the frame. Alternatively, you may determine which side of the fan the brand sticker is on by glancing at the label in the center of the fan. In virtually all cases, the side of the fan that has the sticker and spokes will be the side that the air will come out of.

Step 5: Remove the PC Case’s Front Panel

Remove the front panel of your PC to place a fan in the front. Front panels are normally opened by merely tugging hard on the bottom of the panel’s top, without the need to undo any screws or other fasteners. It may take a significant amount of power to get it off, so don’t worry if you have to tug at it.

Step 6: Mount and Screw Fans Into PC Case

 Most of the time, you’ll have the option of installing front fans at varying heights depending on your needs. If you’re installing one front intake fan, it’s usually preferable to put it near the bottom of the engine compartment. In other cases, though, it may be preferable to put it in the center of the front to drive air directly onto the motherboard region. If in doubt, put it in the front bottom of the car.

Mount and Screw Fans Into PC Case

Place the fan, so the cable to the motherboard or power supply has easy access to the inside of the case. If not, the fan cable may not reach the motherboard. In addition, use a fan cable extension (3 or 4 pins) or a Molex adapter to connect the fan to the power supply rather than directly to the fan.

Line up the four corner holes on the fan with their corresponding holes on the case and screw them in using the supplied case or the fan’s screws. When it comes to how firmly you should screw the fan in, you want the fan to be nice and tight to prevent any vibration or rattling sounds. However, as with installing any other PC component, avoid overtightening the screws to the point where they become difficult to remove.

Step 7: Connect Fans to a Motherboard or PSU

 A case fan should be connected directly to the motherboard since this enables you to change the fan speed from inside the motherboard’s BIOS. Motherboards come typically equipped with at least two fan headers, with many excellent models including three or four. This kind of fan header will often need dispersal across the motherboard. Depending on the PC motherboard, it works on the real board as either SYS FAN (system fan) or CHA FAN (chassis fan.

Try to connect your fans to the fan header on the motherboard closest to you to prevent additional wires trailing about. Alternatively, suppose your motherboard does not have enough fan headers to accommodate all of your case fans. In that case, you might purchase a fan splitter (also known as a Y-splitter), which will connect two case fans to a single motherboard fan header. Alternatively, you may connect the remaining fans to the power supply.

When the case fan remains directly linked to the PSU, it will run at full speed. Four-pin Molex connectors are required to connect a case fan to the power supply. An additional component is a three-pin to Molex adapter, which you connect to the fan and then connect to the power supply’s Molex wire.

Step 8: Verify that your Fans have been Installed Correctly

If you want to ensure that your fans get mounted in the appropriate direction, you can use this pc airflow guide. When you first turn on your computer, place tissue or another extremely light object in front of each fan to try it out for the operation. If you see that the is being dragged slightly towards the fan, that is the intake side of the fan (pull). However, if tissue blows outwards, it’s the exhaust (push) side.