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Thread: PSU fan cable

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    PSU fan cable

    do you have to plug the PSU fan cable into the pwr_fan1 slot on the motherboard?
    dont think mine will reach and wanted to ask before plugging it into any old fan slot...

  2. #2
    I R Toff Pandi! TAKTAK's Avatar
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    Re: PSU fan cable

    PSU fan cable??????

    your not muddling up with a floppy power connector are you???

    AFAIK a PSU's fan should be controlled internally to the PSU........
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    boop, got your nose stevie lee's Avatar
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    Re: PSU fan cable

    some PSUs have a fan monitor cable that plugs into the mobo so the monitoring programs can pick up the PSU fan speed.. my enermax has one, I think its plugged in the one that was closest to the PSU.. just remember which connector you plug it on so you know which value in whichever monitoring software you use relates to it..


    basically.. plug it into whichever fan slot it can reach..

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    I R Toff Pandi! TAKTAK's Avatar
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    Re: PSU fan cable

    ooooh, i've never come across that....

    it does make sense though...

    but it shouldn't matter which fan header that you connect it to.
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    boop, got your nose stevie lee's Avatar
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    Re: PSU fan cable

    you are young mr TAKTAK padawan sir.. once you've built 10 or more PC's then you start to learn things.. if you've rebuilt the same PC 6 times because of hardware IRQ conflicts and general meltings of components, you start to learn even more about how to fit them together..

    (thermaltake fans + hardcano failed = melting passive cooled graphics while playing crysis/two worlds.. mobo capacitor of some sort popped too))

    but thats what HEXUS is for.. learning new things..

    if the internal fans aren't cooling enough though, I heartily reccomend a 12 inch desk fan with rotatey base, at 4000rpm it doesn't half shift some air.. having PC next to open window helps aswell... dont think theres a connector on the mobo to plug it into though, i'll go have a look later..

  7. #6
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    Re: PSU fan cable

    none of my PC's (5 of them still in the house) and the numerous other peoples PC's that i have dealt with and the other PC's that i have been in, have had a PSU fan connector........

    I guess i'm just Lucky

    (but i'll know for next time)

    and i've used a wide range of PSU's from Corsairs to Bestecs that could implode at any minute
    Last edited by TAKTAK; 04-07-2008 at 09:44 PM.
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    Re: PSU fan cable

    The only PSUs that I heard of that use PSU fan monitoring via 3 pin cable is the old Antec Trupowers and some Thermaltakes, other than that generally PSUs do not have them

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    Re: PSU fan cable

    Quote Originally Posted by stevie lee View Post
    (thermaltake fans + hardcano failed = melting passive cooled graphics while playing crysis/two worlds.. mobo capacitor of some sort popped too))
    sounds expencive, sorry to hear that

    my PSU is a 525W enermax modu 82+, the native cables are the 24pin motherboard connector, the 8 pin CPU connector and a fan cable (it only has 2 cables, live and earth? so im guessing you cant control its speed)
    so i should be able to just plug it into the nearest fan header on the motherboard?

  10. #9
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    Re: PSU fan cable

    Yep, makes that I konw of that have fan cables are:
    Old antec
    Old thermaltake
    enermax
    Chieftec

    There are probably more I've just not come across them.

    The fan lead only has yellow and black wires so it can only be monitored by the motherboard, you cannot alter the speed through it.

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    Re: PSU fan cable

    Quote Originally Posted by douglasb View Post
    my PSU is a 525W enermax modu 82+, the native cables are the 24pin motherboard connector, the 8 pin CPU connector and a fan cable (it only has 2 cables, live and earth? so im guessing you cant control its speed)
    so i should be able to just plug it into the nearest fan header on the motherboard?

    my PSU has an external twiddly knob near the power switch that controls fan speed, its set to its maximum now, because it's one of the few things left to expell heat.. and its a noisy bugger..

    just plug the cable into nearest fan header, make a note of which one it is, load up a fan monitor program and then you'll know which figure relates to what.. its that simple..


    ________
    Quote Originally Posted by douglasb View Post
    sounds expencive, sorry to hear that
    it would have been expensive if my dad and me hadn't built up a collection of old PCs to nab bits from.. used up 3 graphics cards and the last spare mobo..

    thanks for your concern anyway.. you don't get rid of me that easily HEXUS..

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    Re: PSU fan cable

    Does anyone know what this fan cable is for? I understand the molex to fan converter but there is also a connector with yellow and black wires to monitor fan speed. Surely if that was used then this cable wouldn't be needed in the first place?

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    Re: PSU fan cable

    If you plug in a 3pin fan to the PSU you lose fan speed monitoring, that extra cable negates that.
    In the picture, middle connector is for the fan, right connector goes into the mobo, and the left connector goes to the PSU.
    Its also a pass through molex type so you can daisy chain and not lose that entire PSU molex cable for a simple fan.

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    Re: PSU fan cable

    I understand that, but if there is an available connector on the motherboard to connect the speed sensor connector to, then you could just plug the fan right into the motherboard?

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    Re: PSU fan cable

    unless the fan cable is not long enough to reach the motherboard, but yes in greneral they are pointless additional wires in your pc case.
    Although they are handy to take apart, re-wire and turn into normal 3pin fan extention cables.

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    Re: PSU fan cable

    Quote Originally Posted by watercooled View Post
    I understand that, but if there is an available connector on the motherboard to connect the speed sensor connector to, then you could just plug the fan right into the motherboard?
    yep you can, unless the fan is very high powered in which case you don't want to burn out the mobo header.

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    Re: PSU fan cable

    Yeah, maybe it's intended to be modified to suit the user's needs?

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