Can you advise me about better cooling my tower PC?

Justin Ellenwood January 12, 2013
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I have a multimedia tower that I want to improve the airflow in. I have multiple computer case fans that I want to use. The idea was that I would put 2 per shelf. One for pulling in cool air and one for pulling out hot air. I have 2 questions when it comes to this:

How do I convert the fans so that I do not need a PSU?

How can I make it so that I can turn the fans on and off with a switch?

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