Are there any PWM fan controller products out there with actual physical control knobs for each individual fan, like the oldschool 3.5/5.25 bay voltage controllers? I can't seem to find any. Is it true that the undervoltage method really does put out a bunch of extra heat compared to PWM?ģ. Just how superior is PWM in terms of power efficiency compared to the usual undervoltage method?Ģ.

I'm not sure these things could handle, say, 5 of these fans.ġ. This is good enough for me, however, they do not really specify what their max power per channel or total is. I've found a bunch of PWM fan hubs that use SATA/molex power from the PSU, and are controlled entirely by one input from the motherboard. The only problem, of course, is that the fans I prefer running at partial speed draw enough power that I wouldn't want to attach them to the motherboard headers. I see also that there are many PWM Delta fans on the market now. AND generates less heat in and of itself compared to the under-volting method. It would appear it is both more power efficient for any given level of fan performance. Well, it seems PWM is the thing now, and for good reason. For ages I've been used to controlling these 12-20watt mid 100's max CFM Delta fans the usual way, through voltage adjustment devices, so I can run these powerful 120x38mm fans at low voltage, enjoying both superior turbulence against fins and the moderate noise levels (some might call very high) I demand, compared to the quiet 25mm fans everyone uses.

Motherboard pwm