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Fan question

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Cornel

Member
Joined
Nov 15, 2003
Location
Fl
Here is a problem I have no idea how to solve :bang head. Any hints/solutions will be greatly appreciated:
Given one regular case fan and one fan controller. The fan controller's connector has 3 pins corresponding to: G, 12V and RPM monitoring (???). The fan has only 2 wires: G, 12V.
Question: Is it possible to monitor fan's RPM? How?

My opinion is that it should be a solution. That's because the speed of that fan was previously detected somehow. The setup was the following: 3pin connector from the PSU (Antec True 430) on the mobo and the fan connected to the "Fan Only" molex. The reading was within the specs of the fan and was increasing with the temperature of the case (feature of the PSU).

Maybe it should also be mentioned that the fan controller is a CoolerMaster Aerogate II.

Thank you very much
 

vonkaar

Member
Joined
May 20, 2003
Location
Colleyville, TX
The RPM monitoring function is either built-in to the fan, or it isn't. If there is no 'third' wire, you don't have the ability to monitor fan speed. The only way to add such a function would be to implement your own electronics... which would be a hell of a lot harder and more expensive than simply buying a new fan that *does* have the function.
 

dalilman52

Member
Joined
Jun 26, 2003
Location
Houston
im not sure how the fan's speed was being detected earlier with the psu but that doesnt matter right now

the only way u would be able to get rpm sensoring is if u lifted the sticker on the fan on the motor area, where all the spec's are

if u see the 2 wires coming out of the small circuit board, then good, u should be able to see a 3rd connection point that is just a solder point w/o a wire coming out of it (if not, ur fan doesnt have rpm sensoring capabilities and ud be better off buying another fan that does), if u solder a wire to that small point and connect it to the fan controller somehow u will be able to monitor the fan's rpms
 

Hookem

Member
Joined
Jul 3, 2001
Location
Houston Texas
Since you are talking about "fan only" connectors I can only assume that you have the 3pin connector from you Antec True series power supply connected to your motherboard...In which case it is telling you the speed of the fan inside the power supply...;)