Powering Case fans from PSU only???

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  1. JeneM's Avatar
    Posts : 7
    Windows 10 Pro Full 32/64bit build 14393
       #1

    Powering Case fans from PSU only???


    Hi all. I recently bought a new motherboard Asus Z170M-E D3 and it has only 2 Chassis 4pin pwm connectors that I plan to hook up to my 2 new Enermax fans in the front as an intake. The Case came with a 120mm fan for the back and a 140mm fan for the top that are 3 pin and I wanted to know if its possible to use these as Exhause fans powered only by the Corsair RM650i power supply. Each Enermax fan came with a 2 pin molex power connector that I used to connected to the exhause fans. Will this work? Powering Case fans from PSU only???-fanconn.jpgPowering Case fans from PSU only???-frontcasefans.jpgPowering Case fans from PSU only???-backcasefans.jpg
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  2. Dude's Avatar
    Posts : 15,307
    Windows 10 Pro X64
       #2

    Yes, the molex connector will power them.
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  3. Berton's Avatar
    Posts : 11,074
    Win10 Pro Versions 2004 and 2009/20H2, Win10 Pro IP_Dev, Win10 Home 1909
       #3

    I've done some like that, only requirement was enough Molex connectors available. Of course there'll be no control of the fan's speed which in turn may be noisier.
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  4. BunnyJ's Avatar
    Posts : 22,736
    Windows 10 Home x64
       #4

    Thanks for the information guys.. that answers the same question I had.

    Jeff
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  5. Berton's Avatar
    Posts : 11,074
    Win10 Pro Versions 2004 and 2009/20H2, Win10 Pro IP_Dev, Win10 Home 1909
       #5

    You're welcome.
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  6. JeneM's Avatar
    Posts : 7
    Windows 10 Pro Full 32/64bit build 14393
    Thread Starter
       #6

    I had read that on here but was just afraid my power supply would be too much for those fans. Cool. Thanks Yall!!:)
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  7. Stephanie's Avatar
    Posts : 14,586
    Windows 10 Professional x64
       #7

    Hi KoKoGirl00 you can have a wide range of Fan Speed Controllers on the market from quite simple to Hi-Tech, most fit between (Power and the Fan / Fans) and a very wide price range so its worth the time to shop around if you decide to control your Fan Speed :)

    Powering Case fans from PSU only???-47-46.jpg

    Powering Case fans from PSU only???-48-16.jpg

    Note: Fan controllers lower the Voltage to the Fan.
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  8. BunnyJ's Avatar
    Posts : 22,736
    Windows 10 Home x64
       #8

    Good idea.. never thought of that one.

    Jeff
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  9. JeneM's Avatar
    Posts : 7
    Windows 10 Pro Full 32/64bit build 14393
    Thread Starter
       #9

    Yea I was looking into those after I had already purchased and installed the 2 enermax fans. Now I have 2-3pin and 2-4pin. Ugh! So I was again reading my corsair psu manual and forgot about this little plug that the manual states to plug in to the power supply and the other end into a USB header!?! Then to download Corsair Link Dashboard which said I'll be able to control the fan speeds from my desktop. Of course it did add to check with the motherboard manual for the location and compatibility. Did that and found nothing.
    What to do?? What to do???
    Attached Thumbnails Attached Thumbnails Powering Case fans from PSU only???-img_0424.jpg  
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  10. JeneM's Avatar
    Posts : 7
    Windows 10 Pro Full 32/64bit build 14393
    Thread Starter
       #10

    OH and one more thing... I'm not a gamer and only use my pc for basic stuff. I don't have a graphics card or anything else that will be causing serious heat so do I really NEED 4 fans?? I'm kinda a newbie to building and purchased the Asus Z170M-E D3 motherboard first and bought everything else according to what the hardware compatibility manual said.
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