1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Fan Splitter Query (Gelid CA-PWM-03)

Discussion in 'General Hardware' started by pete_agreatguy, 23 Dec 2018.

  1. pete_agreatguy

    Gangster

    Joined: 8 Dec 2012

    Posts: 180

    Location: UK

    Hi all,

    Quick query:

    Using a mATX motherboard that only has 1 chassis fan header but need to connect 3x chassis fans to this header.

    Going to use the Gelid solution (PWM 1-TO-4 SPLITTER - CA-PWM-03).

    The fans use only 0.2 amps. The motherboard header supports 1 amp in total.

    Can I just connect all 3 fans via the fan connectors and not bother with the molex power connector?

    Or do I actually have to connect the molex power connector?

    Just I'd rather not have all 3 fans running at full speed all the time.

    Thanks
     
    Last edited: 23 Dec 2018
  2. Big Frank

    Gangster

    Joined: 2 Aug 2018

    Posts: 200

    You don't need to use the molex I'm sure the molex is just an optional extra.
     
  3. pete_agreatguy

    Gangster

    Joined: 8 Dec 2012

    Posts: 180

    Location: UK

    That's what I thought.

    Thank you :)
     
  4. Tealc

    Soldato

    Joined: 13 Jul 2009

    Posts: 7,028

    Location: Llanelli

    Are you sure? Images that return when I search show that the 4 pin connector only has two positions populated, which can only be tach and PWM. The Molex, therefore must carry the power.

    Provided you plug in 4 pin fans they'll all run at whatever PWM duty cycle dictates.

    3 pin fans will run at max speed.

    You'd need a 3 pin splitter and lose any PWM control.

    Or use a PWM to 3 pin converter.
     
  5. LuckyBenski

    Mobster

    Joined: 28 Dec 2017

    Posts: 4,834

    Location: London

    Good point - OP says chassis fans which implies 3-pin, but if they're using DC voltage control that will probably stop working
     
  6. freddie64

    Mobster

    Joined: 22 Mar 2008

    Posts: 2,951

    Taken from the Gelid product page.

     
  7. pete_agreatguy

    Gangster

    Joined: 8 Dec 2012

    Posts: 180

    Location: UK

    Hi guys,

    I got directly in touch with Gelid to clarify this. Included my initial message and their reply below:

    Dear Sir / Madam,

    I would like some clarification on how this product works.

    Using a mATX motherboard (Asus Prime B350M-K) that only has 1 chassis fan header but I need to connect 3x chassis fans to this header. The fans use only 0.2 amps. The motherboard header supports 1 amp in total. Can I just connect all 3 fans via the fan connectors and not bother with the molex power connector? Or do I actually have to connect the molex power connector? Just I'd rather not have all 3 fans running at full speed all the time if they can be all controlled by PWM.

    Thank you for clarification.
    Kind Regards,


    REPLY:

    Yes you can attached all three fans, they will spin at the same speed, if connected to a PWM header, otherwise they will all spin at full speed

    GELID TEAM
     
  8. LuckyBenski

    Mobster

    Joined: 28 Dec 2017

    Posts: 4,834

    Location: London

    On looking closer, the 4 output plugs seem to have 4 wires each, it's only the source connector that's got PWM and a tach feedback. :)
     
  9. Tealc

    Soldato

    Joined: 13 Jul 2009

    Posts: 7,028

    Location: Llanelli

    Did they actually answer your question though?

    Anyway correct information is already provided above.
     
    Last edited: 27 Dec 2018
  10. pete_agreatguy

    Gangster

    Joined: 8 Dec 2012

    Posts: 180

    Location: UK

    I would say yes. Why do you think they haven't?
     
  11. Tealc

    Soldato

    Joined: 13 Jul 2009

    Posts: 7,028

    Location: Llanelli

    Your question was actually about the Molex connection, they didn't answer that, and we'd already discussed that topic and brought it to conclusion.

    If you are happy though, then that's all that matters.
     
  12. pete_agreatguy

    Gangster

    Joined: 8 Dec 2012

    Posts: 180

    Location: UK

    Good point. I'm under the impression I do not need to connect the molex cable; just the 3 fans and the PWM fan header to the motherboard.

    You do need to connect the molex cable. My apologies; I missed what was meant by tach and pwm wires above. The power is directly drawn from the PSU as stated on the web site which freddie highlighted above.
     
    Last edited: 29 Dec 2018