Reading fan RPM's


  1. TechTune
    Posts : 29
    Win7 Professional x64
       New #1

    Reading fan RPM's


    Hey guys..

    I was wondering if anyone knew what I should look for regarding molex connectors from hardware and on the motherboard to be able to view RPM's. I know a 3-pin molex will get you a fan reading, but where should it connect, and what if it's 4-pin?
    The Rampage 2 Extreme supports reading fan RPM's throughout the whole computer and it's enabled in BIOS, but I think the guys who built this one perhaps messed up some connections.
    I get alot of temp readings, but only the CPU fan gives me a fan reading..
    -
    Reading fan RPM's-speedfan.jpg
    -
    Anyone?

    Michael
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  3. Crispy
    Posts : 1,039
    Windows 7 Ultimate x64 Service Pack 1 (Build 6.1.7601)
       New #2

    You cant get a reading from a 4pin connection that's only a 12v, you need to have a 3pin plugged into the mobo from the fan and it read that info form the BIOS.
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  4. TechTune
    Posts : 29
    Win7 Professional x64
    Thread Starter
       New #3

    Ahh, okey.. Thanks Crispy :)
    Does that mean any fans with only 2 wires are unable to read rpm?
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  6. thefabe
    Posts : 4,280
    Windows 7 ultimate 64 bit / XP Home sp3
       New #4

    From what I just read on Tomshardware it said 2 wires are for running the fan positive and negitive, the third wire reads the rpms. Fabe
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  7. Crispy
    Posts : 1,039
    Windows 7 Ultimate x64 Service Pack 1 (Build 6.1.7601)
       New #5

    TechTune said:
    Ahh, okey.. Thanks Crispy :)
    Does that mean any fans with only 2 wires are unable to read rpm?
    As long as they can plug into the motherboard via a 3pin connection then yes.
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  8. thefabe
    Posts : 4,280
    Windows 7 ultimate 64 bit / XP Home sp3
       New #6

    This is the diagram I posted my reponce from. Fabe Reading fan RPM's-fan-power-connectors.png
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  10. th3r0ck
    Posts : 112
    Windows 7 Ultimate x64
       New #7

    use GPU.Z

    google it
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  11. TechTune
    Posts : 29
    Win7 Professional x64
    Thread Starter
       New #8

    Thank you all, always great help on this forum!
    th3r0ck, heheh.. started using that on friday actually, very nice program.
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  12. th3r0ck
    Posts : 112
    Windows 7 Ultimate x64
       New #9

    oppS!! then i am late!!
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