SSD portion of Fusion Drive Speed- late 2014 vs late 2015

Discussion in 'iMac' started by varian55zx, Feb 16, 2016.

  1. varian55zx macrumors 6502a

    varian55zx

    Joined:
    May 10, 2012
    Location:
    San Francisco
    #1
    I have been researching iMacs and I came across a question. I know that Apple stated that the pure SSD options in the current iMacs feature a faster SSD than previous years models, but they made no mention of the fusion drive models.

    My question is, is the SSD portion of the fusion drive in the late 2014 retina iMac any slower than the SSD portion in any of the late 2015 fusion drive options? Or are they the same? And if so, by how much?

    I think this would be good information to consider and I just can't seem to find the answer online anywhere.
     
  2. ivoruest macrumors 6502

    ivoruest

    Joined:
    Jul 12, 2010
    Location:
    Guatemala
    #2
    Most likely there won't be a difference you will notice. SSD is prioritized for apps and OS rather than moving big volumes in which case you could notice any difference (slight) if at all. So, you're basically stuck with speed transfer form HDD portion of the Fusion Drive. Which should be notably slower than an SSD. So, I guess this is why you have not received many replys also. There's just not much of a difference that's worth the hassle.
     
  3. varian55zx thread starter macrumors 6502a

    varian55zx

    Joined:
    May 10, 2012
    Location:
    San Francisco
    #3
    Ok, just to make sure I'm being clear. Apple announced that the pure SSDs in the new Macs are much faster than the old ones, not a surprise. But what they didn't announce, and what no one has ever said ever, and what no one has ever asked ever, save me, is if that speed increase applies to the SSDs paired in the fusion drives of the '14 and '15 iMacs respectively.

    So, with that in mind, you said it's not a factor. I'm not disputing that. But it just seems like if one had a much faster SSD you'd HAVE to notice the difference, but who knows. But I think I might have been the first one to raise this question.

    I'm wondering because I might need to buy another iMac now for non-personal use and I'm narrowing it down.
     
  4. killhippie macrumors member

    killhippie

    Joined:
    Jan 12, 2016
    Location:
    UK
    #4
    The 5k Late 2015 iMac uses 4 lane PCiE where as the 2014 imac uses 2 Lane PCiE flash memory on the fusion drive as well as the pure SSD version. 4 lane is much faster. Hope that helps.

    http://arstechnica.co.uk/apple/2015/10/apple-goes-all-retina-for-its-27-inch-skylake-imac-refresh/
     
  5. maflynn Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #5
    I believe they did, in that the newer Fusion drives are faster (even with a small flash storage) then the older ones.

    As noted above, the new iMac uses the 4 lane PCIE interface so it will be faster then the prior model. I'm very happy I waited until Skylake for this bad boy :)
     
  6. varian55zx thread starter macrumors 6502a

    varian55zx

    Joined:
    May 10, 2012
    Location:
    San Francisco
    #6
    Thanks guys.

    I'm very happy I waited for Skylake too because I truly have an amazing computer now. I can't get over this screen, or anything!

    2014 seems like it has some problems.

    Your answers are more along the line of what I was asking and also what I expected the answer to be. I had to do some research for a project, but I suspected that to be true. Not that 2014 is a bad machine.
     

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