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Solved: two 3-pin fans, 4 pin splitter

Discussion in 'Hardware' started by Dougx789, Feb 18, 2015.

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  1. Dougx789

    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 :)
     
  2. Triple6

    Triple6 Moderator

    Joined:
    Dec 26, 2002
    Messages:
    52,935
    First Name:
    Rob
    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.
     
  3. Dougx789

    Dougx789 Thread Starter

    Joined:
    Apr 6, 2010
    Messages:
    619
    Excellent, thanks for confirming that!
     
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