Solved: two 3-pin fans, 4 pin splitter

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Dougx789

Thread Starter
Joined
Apr 6, 2010
Messages
619
Hi,

I have two 3-pin fans (Case fans) and went to buy a splitter to connect them both to the same motherboard header. ( I want them both running at the same speed)

The splitter I bought is a 4 pin PWM fan splitter http://www.amazon.co.uk/Akasa-AK-CB...8&qid=1424313507&sr=8-1&keywords=fan+splitter
(late night and first braided one I saw that looked like it was good quality)

One header of the splitter has all four pins, the other has pins 1, 2 & 4.

So the first fan will have pins 1, 2 & 3 and the second will only have pins 1 & 2

Am I right in think that by hooking up my fans like this, the first fan will be detected by the motherboard (via pin 3) and the same voltage, therefore speed will be sent to both fans?

Or will the second fan just run at full speed all the time?

Is there any disadvantage to using this cable / would there be any advantage to having a 3pin splitter to two 3pin headers?

Thanks :)
 

Triple6

Rob
Moderator
Joined
Dec 26, 2002
Messages
52,933
Only the one fan will be monitored(seen) by the motherboard, but both will be affected/controlled by any speed changes; both should run at the same speed if they are identical fans. You can't have two fans monitored if you use one fan header.
 
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