Fan filters are not necessary but they are helpful. They are basically filters attached to fans that catch dust, lint, and other airborne particles. They allow a much cleaner air to enter your case which allows for better thermal transfer from heatsinks. There actual performance benefits are questionable though. The one guaranteed good aspect about them though is that they will catch the dust that would normally accumulate into your computer and inside your fans. Dust inside your fans will cause your fans to become less efficient and lower your CFM rating and heavy accumulation of dust inside your computer can lead to short-circuits. The filters also need to be cleaned once in a while so that dust does not accumulate and the filters start limiting your intake.
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2/21/05 at 10:39am