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How to Keep Your Tower Cool

As processors get both smaller and faster, their ability to generate heat has only grown. One of the more effective ways to get rid of that heat is by using fans to move hot air out of the case so that cool air can replace it.

How Does Air Cooling Work?

The basic idea behind air cooling is that the simplest way to remove excess heat from the computer is by air exchange. Your various components generate heat, which then passes into the air before removing from the case. It's a simple enough idea, but there are a few things to keep in mind:

  • Heat Rises: It's more efficient to place your intake fans at the front of the case near the bottom and your exhaust fans at the rear near the top. This follows the natural flow of hot air and makes cooling the interior of your case more efficient.
  • Negative Pressure: You want more exhaust fans than intake fans so that you can keep cool outside air coming into you case wherever possible.
  • Remove Dust: Your fans will work better and last longer if you can keep the dust out of your case. Dust traps heat and blocks airflow, a double whammy.

What Features Should You Look For?

When looking for a computer cooling fan there are a number of factors that you need to consider before actually making the decision. Almost all fans rely on DC power and run on 12 Volts because it's readily available from your computer's power supply. Dustproof fans offer longer lifetimes. Some deal with fan efficiency, others with fan lifetime.

  • Bearings: All fans spin, and that means they need bearings. Entry-level computer fans often have sleeve bearings which have shorter lives and produce more noise. Sunon MagLev fans rely on magnetic levitation to support the blades, so there is no physical connection involved. This is not only quieter, but also lasts longer because there's less friction to deal with.
  • Fan Size: Size matters because a 120 mm fan can move much more air at a given speed than an 80 mm fan. Larger case fans not only last longer because they don't have to turn as fast, but also produce less noise. Still the important number is CFM, which stands for cubic feet per minute and refers to the total amount of air the fan moves.

Types of Computer Fans

The two main types of fans are case fans and CPU coolers. Every system has a cooler mounted on the CPU, usually with a large fan on top of a heatsink. One thing to be aware of regarding size is the available space. You may have difficulty fitting a CPU cooler in your case once the fan size goes past 140 mm. Sunon MagLev technology helps a lot by reducing power consumption as well as noise. A good cooling system makes all parts of your system last longer.

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