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Lesson 4: Case fan installation - replace computer fan, computer fan screws

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Overview

In lesson 4 we'll install or replace the computer fans with computer fan screws, into the system making sure the direction of airflow is correct and discuss cooling the hard drives.

What we want to create is airflow, bringing in cool air from the front of the case and exhausting the hot air out the back.  To do this, we use case fans.  Some cases also bring cool air in from the bottom and side of the case and some cases also exhaust the hot air out the top of the case.

The case we're using for this build, includes 3 fans already installed. 2 in the front to bring in cool air and 1 in the back of the case to exhaust the hot air. There are places for 4 more fans. 2 on the side panel, 2 at the top of the case and 1 on the bottom of the case. We’re not going to add additional fans to this case.

On a previous build we added a 120mm fan to the side of the case. The fan came with a 3 pin power cable and a 3 pin to 4 pin molex adapter.  

Air Flow Direction
On the side of the fan there is an arrow that tells us the direction of airflow.  We'll turn the fan so air flows into the case and slip it into the 120mm fan bracket on the side of the case.

Installing the Fans
This is a 120mm fan with a 3 pin power cable and a 3 pin to 4 pin molex adapter.  On the side of the fan there is an arrow that tells us the direction of air flow.  We'll turn the fan so air flows into the case and slip it into the 120mm fan bracket on the side of the case.

On another build, the case did not come with a rear exhaust fan so we installed a 120mm fan.  This case had no fan bracket so we used the self boring screws that came with the fan.

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