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Customer Review

41 of 45 people found the following review helpful
5.0 out of 5 stars Works great., 9 Jan. 2013
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This review is from: Akasa AK-CBFA04-15 PWM Fan Splitter Cable for 2 Fans (Accessory)
This cable lets you use 2 PWM fans on 1 motherboard connetion. The cable has 4pins on one side and 3 pins on other. BOTH fans are PWM controlled. The missing pin from the second cable is the temprature sensor.

So to sum it up: This cable checks temprature from 1st fan and then send PWM signal to both fans and they both spin at the exact same rate.

You need 2 4PIN (PWM) fans to use this cable.
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Showing 1-2 of 2 posts in this discussion
Initial post: 26 Sep 2013 13:09:58 BDT
Last edited by the author on 26 Sep 2013 13:17:07 BDT
Mr says:
I had one of these delivered today. When I saw one side had three cables I thought there was a mistake. Anyway I came to the item page to see if I had made a mistaken order. Since there was no item description, I scrolled down to feedback and saw you review first.

I was pleased to see that you made the point of four cables to one side and three to the other. Nicely done. I need not worry now. (I was panicking that one fan coming off it would be default to maximum.)

However I don't understand how you mean the fourth pin checks temperature from a fan. Your temperatures are monitored within the CPU, or a temp sensor on your motherboard for case fan. (That's most likely in the Northbridge chipset.)

The appropriate signal is sent to the CPU fan header, and the fan plugged in adjusts to the signal it is given. There is no measuring temperature going the other way. Maybe it's to return fan speed data, as CPU fan speed is monitored without a doubt.

In reply to an earlier post on 24 Oct 2013 12:00:02 BDT
Last edited by the author on 24 Oct 2013 12:02:18 BDT
D. Dimitriou says:
You are right. The 4th pin is the control (PWM) pin. It controls the speed of both fans through PWM signals.

It has nothing to do with temperatures.
A PWM fan uses 4 wires; fan speed signal, PWM signal, 12V & 0V.

The splitter has 4 wires that attach to the first fan and 3 for the 2nd fan, because the motherboard can only monitor one fan and will then use that reading to control both fans accordingly via the PWM signal.
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