Adding more case fans

Discussion in 'Overclocking & Hardware' started by yangby, Feb 14, 2017.

  1. yangby

    yangby Member

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    Hi all,

    I recently got a new case and it has got 4 or 5 (i think) fans. However my motherboard only has 3 system fan heads. Im not sure what the adaptor is called, but is there something that will allow me to grab power from the PSU or share the power coming out of the fan header from the mobo?

    Also if I share the power coming out of the fan header, will the speed of the fan(s) connected to the header be notably slower, thus have less air flow?
     
  2. power

    power Member

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    it depends on the fans themselves.

    what case did you buy?

    molex - 3/4 pin adapter is usually what you are chasing.

    fans run directly off molex will generally run full speed unless connected to 5V so some sort of fan controller is usually a better way to go.
     
    Last edited: Feb 14, 2017
  3. nCrypt

    nCrypt Member

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  4. ginger_nuts

    ginger_nuts Member

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    From memory, most motherboards allow about 1amp of power draw.

    This is plenty.

    If all your fans are the same run them with a splitter from the motherboard, as long as the current draw is less than one. If it is more use a spliter with a molex. That way the motherboard controls the fan speed, yet power is directly from the psu.

    This link should show everything you need.

    https://www.pccasegear.com/category/19_1347/cables/internal-power-cables
     
  5. tree86ers

    tree86ers Member

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    as power said i would recommend a fan controller if you don't want to use fan spliters that run off the motherboard headers.

    I have until my last build never used a fan controller but i dont think i will use anything else now.
    I went a bit overboard and got the corsair commander mini. considering everything else i have is corsair (H100i and AX1200i) it all shows up in corsair link and i can set everything in one place.
     
  6. nCrypt

    nCrypt Member

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    the commanders are great. i didnt link that one since its twice the price as teh nzxt

    having used both, the commander is better then the grid.
     
  7. OP
    OP
    yangby

    yangby Member

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    Thanks alot guys! I've just popped out to the computer shop and purchased a 3 pin power splitter. I'll see how this goes.

    :thumbup:
     
  8. MR CHILLED

    MR CHILLED D'oh!

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    You need five fans??
     
  9. Ravennoir

    Ravennoir Member

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  10. OP
    OP
    yangby

    yangby Member

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    Hahahaha seems like alot. Can never have too many! :D

    If I remember correctly, they are positioned:

    • 1 x top (exhaust)
    • 1 x side panel (blowing at CPU and GPU)
    • 1 x rear
    • 2 x front for HDDs
     
  11. power

    power Member

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    not excessive at all, I have 5 - 2 front over HDD's, 2 top, 1 rear exhaust.
     
  12. MR CHILLED

    MR CHILLED D'oh!

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    Well it just takes extra power that isn't necessary.

    Checked the sys temps with 2 less fans and see what you find ; )
     

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