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Thread: Fan controlling, best solution?

  1. #1
    Senior Member mikeo01's Avatar
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    Fan controlling, best solution?

    So got my new computer case, lots of fans but now I have a problem I ran into, I don't have enough fan headers.

    Now, I have a lot of fan adapters, but I want to be able to control my fans via the headers which I can do now. It seems like only 2 of the headers can control (even though in the manual it says the 3 out of 4 can).

    All my fans are 3-pin:
    4x 120mm (0.4A each)
    2x 140mm (0.5A each I THINK, not sure)

    1x 140mm is being controlled via fan header, and 1x 120mm top fan is being controlled via header. I was wondering whats the best way to control these, or advice as I found a cable splitter on Scan being able to insert many fans onto one header along with a 4-pin molex.

    So I was wondering if I could control 2x 140mm on one header (my manual doesn't state what ampage the 3-pin headers can support, but the CPU header can support 1.0A). And the 2x 120mm on another header. So the maximum ampage would be 0.9A/1.0A. I am not overly sure if this is dangerous provided I use that 4-pin molex which I assume supplies extra umf to take the pressure off the headers?

    I don't want to go down the fan controller route as they're messy, expensive and I don't really trust them.

    Thanks

    The cable is for PWM fans, but my header reduces the voltage so I assume this will effect all fans connected simultaneously. I want a low RPM control for quietness and full whack for temperature rise based on CPU. Not sure if this is safe? http://www.scan.co.uk/products/akasa...oogle+shopping
    Last edited by mikeo01; 11-09-2012 at 07:19 PM.

  2. #2
    Senior Member Pob255's Avatar
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    Re: Fan controlling, best solution?

    That will work to power multiple fan, but not with control, it would give control to PWM fans on a PWM header only.
    The molex is supplying a constant 12v, PWM fans work by pulsing the current instead instead of reducing the voltage. (the 4th wire on a PWM fan/header is the one that feeds it the pulse rate)

    You could use these http://www.scan.co.uk/products/shark...e-connector%29 to feed two fans off one header

    A fan controller would be the simplest option, http://www.scan.co.uk/products/phoby...single-bay-525 10amp total (1.6amp per channel) or http://www.scan.co.uk/products/nzxt-...ller-525-black with is 2.5 amp per channel (so 12.5amp total)
    not expensive for the number of fans they control, they are manual control though.
    If you want automatic control then the NZXT sentry 2 is an excellent choice and not too pricey http://www.scan.co.uk/products/nzxt-...ntroller-meter

    last option would be a combination, a Y splitter and a 3.5" fan controller http://www.scan.co.uk/products/akasa...2-usb-20-ports this akasa controller is very nice and cheap

    Yes they will involve a bit of cable management but it's not too bad.

  3. #3
    Senior Member mikeo01's Avatar
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    Re: Fan controlling, best solution?

    Thanks for the reply. Well seen as I can already control my fans I would prefer to go with the cheapest option possible.

    Is it safe to use the Y splitter? The maximum load will be 0.9A (if the 140mm fan is 0.5A). I assume all the headers are rated at 1.0A. If you think this isn't safe then a fan controller would be my best option and I would probably go with the AKASA controller.

    I don't mind cable management, fortunately I have a tuck away at my HDD bays.

  4. #4
    Senior Member mikeo01's Avatar
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    Re: Fan controlling, best solution?

    OK sorry I was completely out, my 120mm fans are 0.20A and the 140mm fans are 0.30A. Is 0.50A on a Y splitter cable and 1.0A fan header going to burn anything out?

    Thanks for your help

  5. #5
    Senior Member mikeo01's Avatar
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    Re: Fan controlling, best solution?

    Cable splitter should be fine, is it safe to pull out one of the yellow wires? Isn't that for RPM readings or something, otherwise it may not work?

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    Re: Fan controlling, best solution?

    Is there such a thing as a 3.5" fan controller with usb 3 ports? That akasa pob posted would be absolutely perfect if they were usb 3

  7. #7
    Senior Member mikeo01's Avatar
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    Re: Fan controlling, best solution?

    Hi I just found out something about my Yate Loon fans that came with my case. I have seen them before but never really thought anything of it, a temperature probe. TC case fan.

    Where should I put it? Wedge it on the CPU by the heatsink? Never used one before.

    Its the same design as the Arctic TC F12. 3-pin header for power and a separate cable with a probe at the end for TC.

    Anyone used this?

  8. #8
    Senior Member Pob255's Avatar
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    Re: Fan controlling, best solution?

    Quote Originally Posted by holy god of nil View Post
    Is there such a thing as a 3.5" fan controller with usb 3 ports? That akasa pob posted would be absolutely perfect if they were usb 3
    not that I know of unfortunately

    Quote Originally Posted by mikeo01 View Post
    Hi I just found out something about my Yate Loon fans that came with my case. I have seen them before but never really thought anything of it, a temperature probe. TC case fan.

    Where should I put it? Wedge it on the CPU by the heatsink? Never used one before.

    Its the same design as the Arctic TC F12. 3-pin header for power and a separate cable with a probe at the end for TC.

    Anyone used this?
    Ummmm, most of the temperature controlled fans I've seen us a thermistor that is built into the fan frame and as such you cannot "put" them any ware, they also tend to be a bit overly lose on their setting often not noticeable increasing the fan speed until the air temperature of the air being drawn into the fan hits 50c, which for the internal air temperature of a case would be a bit hot (remember the air temperature will be lower than that of heatsinks)

    The yellow wire on a fan is indeed the RMP sensor wire, a Y splitter should only have the yellow wire connected to one fan as connecting the rpm sensor of two fan to one header causes conflicts which would give you a totally unreliable rpm feed.

    EDIT: according to Hardwearsecrets the fan that come with the 66RCBB are from Hong Sheng and Young Lin not yate loon http://www.hardwaresecrets.com/artic...se-Review/1329 and they are not temperature controlled.

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