Originally Posted by Deuce65
Well, no. A true PWM controller modulates speed via a PWM signal along the fourth wire; the fans get their 12 volts from wherever so it wouldn't make sense to rate the controller's output (i.e, you can plug the fans into any 12 source, fan header, molex, sata, etc. so it makes no difference what the controller is capable of).
If you want to use existing PWM controls from the motherboard header for multiple fans Akaska makes PWM splitters that split the PWM signal to multiple fans (which get their power from sata or molex). If you want to manually control the PWM signal, Zalman makes a device called PWM mate that will vary the PWM signal (again, the fans get their power from molex or sata); interestingly enough, these two devices can be used together to control multiple fans manually via varying the PWM signal.
If on the other hand you are looking to use your motherboard's PWM signal to control fans via voltage control, Sunbeam makes a 30 watt per channel controller called the Rheosmart. I have no idea how well it works though as I have not personally tried it.
I see. It sounds like the PWM mate is what I'm looking for. So the PWM mate allows the fan to draw power directly from something like the PSU?
Edit: It seems the PWM mate is out of production. Maybe a common fan controller is my only option.Edited by geoxile - 10/2/15 at 11:23pm