No RPM reading on 3-wire Panaflo case fans ...

I just recently got around to soldering on the tails of some Panaflo case fans I picked up in the forums a while back. I used a multimeter to measure resistance across each wire and they were all good (all less than 0 ohms). When I plugged the fans into my motherboard and fired it up, they all started spinning, but in BIOS I'm showing 0 RPM for the case fans. I tested the motherboard fan headers with my cpu fan and they work fine.

Any ideas?

Thanks!
- FlypSyde

it could be because the fans spin 2 slow 4 the header 2 pick up

I do not believe that Panaflo fans have a RPMS sensor in them.

i dont think so either, probably why they come stock with a 2pin connector

The fans I got all have 3-pin conectors (black, red, yellow) and markings on the fan itself showing black as (-), red as (+), and yellow as (S). I just assumed that the third wire is the RPM sensor and that it is functional, but I could be wrong. I'll check the part numbers on the fan when I get home.

Are the Panaflo fans known to not have an RPM sensor? Or do they just not work with the voltages from the motherboard? I just thought that all 3-wire case fans had a RPM sensor.

yes panaflows are known to not have a sensor, but you obviously have one that does. (there are ones with the sensor, just not as common) I don't see why your motherboard wouldnt pick it up. Did you try a different mobo header? (i know you said this one worked, but try anotherone anyway.)

Okay, one of the fans I have is part # FBA08A12H. After a quick search online I found out that this model has RPM monitoring optional. A couple reviews I found on this model fan also mentioned the lack of RPM monitoring. Oh well! Thanks for everyone's help!

-FlypSyde