Favorite case fan source?

Discussion in 'The Projects Forum' started by wayneh, Sep 24, 2014.

  1. wayneh

    Thread Starter Expert

    Sep 9, 2010
    12,118
    3,042
  2. bertus

    Administrator

    Apr 5, 2008
    15,647
    2,346
    Hello,

    The following page gives you some more info on the fan:
    http://www.pscmf.com/product/showproduct.php?id=49&lang=en

    There you can see that the one you show is the 2000 RPM version and has a flow capacity of 39 CFM.
    from the three fans you show as alternative, only the last one shows the capacity of 30.5 CFM.

    Bertus
     
  3. wayneh

    Thread Starter Expert

    Sep 9, 2010
    12,118
    3,042
    Thanks, I hadn't been able to find the CFM rating. This one looks interesting. Maybe quieter, and a nice warranty. I can just leave the tach signal unconnected, right? (The original fan is a 2-pin.)
     
    Last edited: Sep 24, 2014
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,539
    2,369
    The spec states a M.B. fan and the third wire is PWM rpm control, if left unconnected it runs flat out.
    Max.
     
  5. wayneh

    Thread Starter Expert

    Sep 9, 2010
    12,118
    3,042
    I think you were looking at the PWM model? The one I'm looking at is the F9 Pro which does not have PWM control. (3-wire). I think running flat out is fine for my application. That's what the old 2-wire fan did.

    I'm a little confused because, I think, the NewEgg specs are wrong (it says the F9 PWM fan is 120mm, which is clearly wrong). The PWM model happens to be on sale $1 cheaper at NewEgg and I think it will run flat out with 100% 12V on the PWM pin. [update: The standard is 5V for the PWM signal, not 12V. Speed is proportional to duty cycle, so +5V 100% should give 100% fan speed.] Flat out according to Arctic appears to be the same flat out as the non-PWM model. Might as well buy the cheaper one?
     
    Last edited: Sep 24, 2014
Loading...