help controlling Nexus fan speeds.

[Brodel]

Hey

I just got 3 new 80mm Nexus fans, I have them all plugged in but using speedfan only two fans show up, my CPU fan (which I already control with it's own Zalman controller) and another fan that doesn't change no matter what I do in speedfan (I've made sure it's set to software controlled rather than on/off).
So I have 3 case fans I want to control, only 1 shows up in speedfan, and the one that does show up isn't even controllable?

 

[Zepper]

Nexus fans already have dropping resistors built in so you aren't going to get much of a range of control available as they are probably already running at ~ 7V and aren't meant to be used on external controllers. Get full range fans if you want to control them.

.bh.

 

[Brodel]

ok, cool. Thanks.

on a side note, what is the point in the 4 pin power adapter? I don't notice any difference with it pluggin in or not.

 

[potato28]

4 pin adapter plugs right into the power supply. 3 pin's go into motherboard. Both give the same voltage. Only difference is that the 3 pin has RPM monitering(for what its good for...).

 

[Zepper]

Most mobos only have 2 or 3 fan connectors besides the CPU, so to use more fans, you'd have to plug them direct to the PSU, thus the 4-pin connectors. And some fans (like the ones I generally use) need too much power to be connected to the mobo. I use a fan controller that has four 3-pin connectors, besides the mobo connectors. The fan controller can handle my high power fans easily. So I don't need any 4-pin connectors at all. The Nexus are low power fans and really don't need 4-pin, but since they shouldn't be controlled anyway, many will just plug them up direct to save the mobo connectors for something else. You could stack lots of fans off one drive power connector from the PSU.

.bh.