MacBook (Pro) fans

Discussion in 'MacBook Pro' started by poiihy, Feb 3, 2015.

  1. poiihy, Feb 3, 2015
    Last edited: Feb 3, 2015

    poiihy macrumors 68020

    poiihy

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    Aug 22, 2014
    #1
    I noticed that some MacBook (Pro) have fans with fewer blades spaced farther apart, while most other MacBook (Pro) have fans with more blades. Is there any difference in performance or sound and are they interchangeable?

    Edit: I noticed some fans have an amount of blades between these two. I've added another image.
     

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  2. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #2
    In recent years Apple redesigned fans for MBPs, especially retina models, to improve efficiency and sound. AFAIK, they are not interchangeable with older models.
     
  3. poiihy thread starter macrumors 68020

    poiihy

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    #3
    So the fan with more blades is the better one? Is it quieter too?
     
  4. GGJstudios macrumors Westmere

    GGJstudios

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    #4
    I don't spend a lot of time looking at fans, so I'm not sure which is which. Are you rebuilding a MBP?
     
  5. poiihy thread starter macrumors 68020

    poiihy

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    Aug 22, 2014
    #5
    No I am not.

    I've noticed that the same model sometimes have different fans.
    Look at the Late 2008 MacBook, the one and only Unibody MacBook.

    On this page the MacBook has a fan with more blades:
    https://www.ifixit.com/Teardown/MacBook+Unibody+Model+A1278+Teardown/589

    But on this page it has the fan with fewer blades:
    https://www.ifixit.com/Guide/MacBook+Unibody+Model+A1278+Fan+Replacement/763

    Also, i've just noticed that some fans have an amount of propellors in between. I edited the original post with the image to compare.
     
  6. GGJstudios macrumors Westmere

    GGJstudios

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    #6
    Interesting. I don't know if Apple had two different fan designs available for the same model, or if one of the fans being shown is an aftermarket fan that has been installed.
     
  7. poiihy thread starter macrumors 68020

    poiihy

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    #7
    One thing for sure, the MacBook (Pro)s always have matching fans.
     
  8. GGJstudios macrumors Westmere

    GGJstudios

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    #8
    You mean for the 15" models that have two fans, as opposed to the 13" models that only have one, right?
     
  9. poiihy thread starter macrumors 68020

    poiihy

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    Aug 22, 2014
    #9
    Yes. If you look in any 15" or 17" inch that has more than one fan, both fans look identical. 13" doesn't have two fans so you can't compare.
     
  10. Natzoo macrumors 65816

    Natzoo

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    #10
    right now my mac is running at 2500 RPM (left) and 2000 RPM (right), no noise at all
     
  11. GGJstudios macrumors Westmere

    GGJstudios

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    May 16, 2008
    #11
    What I meant by my comment about two different fan designs for one model is it's possible that Apple could have redesigned the fans between model releases, so some 13" MBPs of a particular model came with one fan design, while other 13" MBPs of the same model might come with another fan design. Or they might use two different vendors for fans for the same model. I don't know if that happened or not... just considering possibilities. In the same way, some models ship with a different brand of RAM or SSD than other copies of the same model.
     
  12. poiihy thread starter macrumors 68020

    poiihy

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    Aug 22, 2014
    #12
    That's not helpful at all... you didn't even say what MacBook Pro it is.

    ----------

    A bit off-topic but do MacBook Pro fans use ball bearings or sleeve bearings?
     
  13. christarp macrumors 6502

    christarp

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    #13
  14. poiihy thread starter macrumors 68020

    poiihy

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    Aug 22, 2014
    #14
    I know that but I am not talking about that. Those fans have a special proprietary design by Apple and so all those fans I have seen look exactly the same. Older fans were designed and made by other manufacturers, usually Sunon. That's probably why the fans vary, just like the other parts made by 3rd-party manufacturers. Hmm, maybe those different fans have a different sticker. I'll look
     
  15. poiihy, Feb 3, 2015
    Last edited by a moderator: Feb 3, 2015

    poiihy thread starter macrumors 68020

    poiihy

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    Aug 22, 2014
    #15
    Aha! I think i found something! The fan with the fewest blades is made by Delta electronics, while the fan with the most blades (like I have in my MBP) is made by Sunon! I wonder who the fan in-between is made by. I think that was made by Sunon too.

    Now the question is, what is the best fan? The Sunon fan with many blades, the Delta fan with fewer blades, or that fan in between?
     

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