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 4 fans already installed. 2 in the front to bring in cool air. 1 in the back of the case and 1 at the top of the case to exhaust the hot air. There are places for 2 more fans. 1 just behind the hard drives, to help pull through the hot air they generate and 1 on the left side of the case to bring in cool air directly to the video cards. Since the hard drives are right in front of the 2 intake cooling fans they won't need extra cooling. We're going to add a cooling fan to the side of the case to help keep the video cards cool.
Air Flow Direction
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.
Installing the Fans
On our last build, the case did not come with any fans so we installed 4 80mm fans. This case had no fan brackets so we used the self boring screws that came with the fans.
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