Thread: fan wiriring
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Old August 15, 2010, 11:36 PM
Zero82z Zero82z is offline
Join Date: Sep 2009
Location: Montreal, QC
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Originally Posted by MpG View Post
Usually with fan controllers, they give their maximum current rating based on the fan(s) full-load current draw, but the fan controller actually needs to dissipate more heat when you turn the fans down, because less of the power actually gets to the fan itself.
That only occurs with resistor-based controllers that control the voltage going to the fans by increasing or decreasing the resistance. Most if not all modern fan controllers use PWM circuits to control the voltage, which do not have that problem. The heat production will increase with the amount of current the PWM circuit must deliver.
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