70mm fans

GnomeWizarddGnomeWizardd Member 4 LifeAkron, PA Icrontian
edited February 2004 in Hardware
Anyone knows where I can get a 70mm fan that will fit a Athlon 64 heatsink??

Comments

  • SputnikSputnik Worcester, MA
    edited February 2004
    aren't the TMD fans 70mm?
  • ThraxThrax 🐌 Austin, TX Icrontian
    edited February 2004
    I believe so.
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    The TMD fans may work, and there's always www.nexfan.com , which has a 70x25mm fan.

    What's wrong with the fan on it?
  • GnomeWizarddGnomeWizardd Member 4 Life Akron, PA Icrontian
    edited February 2004
    ahh wanted one that pushes more than a stock SLIM fan
  • csimoncsimon Acadiana Icrontian
    edited February 2004
    I like the selection best at www.sidewinder.com
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    csimon... www.sidewinder.com is a security site... www.sidewindercomputers.com is what you meant, I think... :)

    You could get that one from Nexfan that flows 43cfm, but why bother? The A64's stock HSF is very good. Your CPU is running what? 120*F full load, at MOST?
  • csimoncsimon Acadiana Icrontian
    edited February 2004
    Hehe ...I knew that! But to top things off ...they don't have any 70mm's any way! ;P ok www.svc.com :shrugs:
  • GnomeWizarddGnomeWizardd Member 4 Life Akron, PA Icrontian
    edited February 2004
    wouldnt this work with a good 80mm fan?? http://www.svc.com/fa7080-blue.html
  • madmatmadmat
    edited February 2004
    Heck, it'd work with a bad 80mm fan...heh ;D
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    Define "work"

    It'll work in that you'll be able to attach it to the heatsink, and attach an 80mm fan to it.

    However, the airflow is going to be less than what you have with the stock 70mm fan unless you use one of Delta's "focused flow" fans- axial fans HATE backpressure. Adapting it down, even 10mm, is enough to give an axial fan a seziure. Anticipate actual airflow of well under 50% of the fan's rated free-air airflow if you use that adapter
  • madmatmadmat
    edited February 2004
    I think that figure's a wee bit extreme Geeky, I'd figure it to be closer to 70%.
    Although the only true way to tell would be to get it and test it with a wind speed device with and without the adaptor attached.
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    We'd have to test it, but subjectively speaking, I've got a 60-80mm fan adapter around here somewhere. With a SmartFan2 going full tilt, it seems to be pushing about the same amount of air as a 13cfm 60mm fan without an adapter.
  • mmonninmmonnin Centreville, VA
    edited February 2004
    So the little motors on the fans just cant squeeze the air together thru the adapter or what? Funneling air thru an adapter should make the air move faster but not have any more CFM as long as the motor can handle it.
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    It's not the motor, mmonnin, it's the blade design. axial fans can't push/pull air with any kind of force. You need a centrifugal (aka "squirrel cage) fan to do that.
  • GnomeWizarddGnomeWizardd Member 4 Life Akron, PA Icrontian
    edited February 2004
    well now i do have a squirrel cage fan so if I threw that on with the adapter would it be better than the stock fan?
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    that would require experimentation on your part. If it's a small fan, I doubt it. Squirrel cage fans don't push much air for their size compared to axial fans.
  • fuxorfuxor i live in a giant bucket
    edited February 2004
    do the TMD fans have the same mounting holes as an 80mm fan? I've always wanted a few as case fans...
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    No, they don't. They have 70mm mounting holes. There isn't really any compelling reason to use them as case fans, though... they can pull a bit more vacuum (a very little bit) than standard axial fans, but that shouldn't matter for most cases... they're not really any quieter than an 80mm fan that flows the same amount of air- they're marginally louder, if anything. They do sell 70-80mm adapters if you really want to do it, though.
  • madmatmadmat
    edited February 2004
    I remember that when they released those fans they made a big to-do about releasing more sizes within a few months, well more than a few months has passed and I've yet to see anything nut a 70mm tmd fan...I wonder what gives.
  • fuxorfuxor i live in a giant bucket
    edited February 2004
    that's a shame cause they look really nifty. I think they'd make fine looking case fans, if nothing else :) The reduced hub area is really only useful for use with a heatsink, though.
  • Geeky1Geeky1 University of the Pacific (Stockton, CA, USA)
    edited February 2004
    I still tend to doubt that the reduced hub area actually accomplishes anything, but I don't have any proof of that, so...
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