How to Install a Computer Case Fan
Computer case fans are responsible for keeping a computer cool. Without them, a computer might overheat, which can cause instability and reduce the long-term reliability. While computers do generally come with enough fans to keep them cool, upgrading with better components might require that you install more or better case fans. Also, the stock case fans found in many computers tend to be noisy. Installing a newer, better case fan can make your computer quieter.
Installing a computer case can is a simple task and doesn’t require more than a screwdriver and a half hour of spare time. This guide will help you through the process of installing a new case fan step by step.
Opening your Computer’s Case
Before you can do anything you need to open your computer’s case. Unplug your computer and take it to a clean, level working space. On most computers the panel which opens is the panel which is on the computer’s left when you view the computer from the front. You should be able to locate some screws on the rear left edge of the case holding the panel on. Unscrew them and then gently remove the left side panel. On some cases the panel will be designed to swing open, but on others you will need to slide the panel towards the rear of the case before it will come off.
Finding a Fan Mount
The fan mounts in your case are likely to be nothing more than a four screw holes drilled in a square with a vent between them through which air can flow. Usually you will find fan mounts at the front and rear of the case, so start looking there. Once you find a fan mount, measure the distance between the screw holes on the mount. Fans are measured in millimeters, and the most common sizes are 80mm, 92mm and 120mm.
Installing a New Fan
Once you’ve purchased a properly sized case fan, you can install it by placing it inside the case and aligning the screw holes in the fan mount with the screw holes on the fan. Once you have it aligned properly, use the screws supplied with the fan to install it. Keep in mind that computer case fans only spin in one direction, so be sure to install it in the correct orientation. Most fans will have an arrow on them which indicates the direction of airflow. Case fans on the front should take air in, while those at the rear should exhaust air out.
Connecting to Power
A case fan won’t spin without power, so you need to connect your new computer case fan to your computer’s power supply. This is usually done through what is called a Molex connector, a rectangular connector with four pins. Some case fans can connect directly to a computer’s motherboard through the use of a small 3 or 4-pin female connector. If your case fan has this you can simply connect the case fan directly to the motherboard.
Finishing Up
With your new case fan installed and connected, turn on your computer with the case still open. Make sure that the fan is moving air in the direction you want. Once you’ve confirmed, close your computer’s case, reinstall the screws your removed in the first step and enjoy your new case fan!
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