PWM Fans don't show speeds

ShivP

ShivP

ShivP

Soldato
Soldato
Joined
26 Oct 2013
Posts
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Location
Leicester
Hi,

I have 2 Arctic F8 PWM fans - neither of them show RPM readings on the BIOS or in Speedfan. They both show 0RPM and don't change, in Speedfan and in the BIOS. I can change the fan speeds just fine, but no RPM speeds show. The CPU header shows the RPM reading just fine. Is my mobo faulty, or the fans?

Cheers,
Shivy011
 
Rig in my sig, gigabyte z87x-ud3h. Into one of the four fan headers on the board. As I said, I can change the speeds fine but no rpm readings shown
 
Oh, I just saw that the fans are Arctic. In order to have the RPMs, you need to connect the 3 pin header with the yellow wire to the female 4 pin connector. The actual RPM readout is not wired in the 4 pin header so you can easily chain multiple fans and just plug the RPM cable of the last one. They are obviously not going to have the same RPM but if the fans are identical, the control should work similarly on all of them, percentage wise from their maximum RPM at 12V. I am talking about this:

no hotlinking images or images from competitors either!
 
Sorry, don't quite understand. My fans are 4 pin anyway, so they only go in one way. They do have a seperate 3 pin though like that picture.
 
Shivy011 said:
Sorry, don't quite understand. My fans are 4 pin anyway, so they only go in one way. They do have a seperate 3 pin though like that picture.
Click to expand...

I got a link from an undesirable source and moderators removed it, sorry.
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P.S. I hope a link from the Arctic website is fine?
 
So the yellow fan speed plug goes into the motherboard, and the two other 4-pin plugs go into other fans?
 
Shivy011 said:
So the yellow fan speed plug goes into the motherboard, and the two other 4-pin plugs go into other fans?
Click to expand...

Yellow 3 pin male goes into the 4 pin female connector of the fan and you plug the 4 pin male connector in the motherboard header. It is made like that so you can chain PWM fans and regulate them from a single motherboard header (a single blue PWM signal controls them all, they need only power). It is not possible to have more than one fan's RPM data being sent to the motherboard, so the last fan is left with a free female 4 pin connector and you connect its yellow RPM cable for its RPM data to be sent to the motherboard header. You can plug it into a free motherboard header and you will be able to observe the speed of the fan but I see no point in that, it is better to know the speed of the fan/s that you are regulating.
 
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