Why are most fan controllers limited to a minimum of 5v?

Posted by ULTRA_POROV on Super User See other posts from Super User or by ULTRA_POROV
Published on 2010-04-13T00:09:22Z Indexed on 2010/04/13 0:13 UTC
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I have a fan that runs at about 3500 rpm at 12v. At 5v (the minimum that my zalman fanmate allows) it runs at about 2000 rpm which is still quite LOUD. I looked on the net for other controllers that can go below 5v and found nothing. Why is that? Any solutions?

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