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PC Motherboard Fan Headers

  • 06-12-2015 1:59am
    #1
    Johnboy1951
    Registered Users, Registered Users 2 Posts: 14,021 ✭✭✭✭


    In the attached pic there are two 4 pin fan headers for the GA-Z97P-D3 motherboard.

    gigabytefanconnections.png

    The CPU_Fan header is fairly standard, as I understand it, and takes a PWM fan.

    But what about the SYS_FAN connector?
    I have never come across this before so hope that someone here has.

    I don't have the motherboard ..... it belongs to a friend in the UK who tells me a PWM fan does not work correctly .... its speed never changes, running at low speed all the time, regardless changes in the environment.

    Is this for a voltage controlled fan with Sense feedback or some dual purpose header?


Comments

  • #2
    whizbang
    Registered Users, Registered Users 2 Posts: 1,946 ✭✭✭whizbang


    I always believed they were interchangeable.

    was the Bios set to allow speed control of the fans ?


  • #3
    Johnboy1951
    Registered Users, Registered Users 2 Posts: 14,021 ✭✭✭✭Johnboy1951


    I saw a post on another section of boards about problem fans causing the m/board to be RMA'd ...... and it turned out to be the same model board.

    So it seems the board is at fault ...... but 3 pin fans can be used in the socket with speed control.

    It would appear there is no PWM signal on the socket!
    whizbang wrote:
    I always believed they were interchangeable.

    You mean PWM fans and voltage controlled fans?


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